1970 Yenko Nova trans and bellhousing numbers

[rszmjt]

Hi, I am new to this site, and was wondering if someone could tell me the correct bellhousing and trans case, and tailhousing casting numbers for a 1970 Yenko COPO Nova, with the CTB code engine. The reason i am asking is i am doing some work on a 1970 Yenko COPO Nova for a friend, and i am pretty sure that these items are not correct.

Thanks in Advance, and COOL Site.

[MikeA]

Bellhousing:3899621
Case:3925661
Extension:3857584
Cover:3952648

[YENKO DEUCE REGISTRY]

A silver COPO Nova?
http://www.yenko.net/ubbthreads/images/graemlins/naughty.gif

[rszmjt]

Hi Marlin, Yes it is the same silver COPO Nova in the background in Hugger_Sixty_Nine,s Post about the CTB Engine. It has a lot of wrong stuff, and we are trying to get it closer.
MikeA.- Thanks for the numbers, that helps. I was pretty sure about all the numbers except the trans case, i have seen Corvette/Camaro,s with 660 cases in 70, i thought that just LS6 Chevelle,s got the 661 case, until 71 when everything got them. I had a buddy who has passed away , who had a 70L78 Nova and it had the 660 case, but i think it was a early car.

Thanks for the Help!!

[crash]

660 main cases were used as late as Dec. 1969... 661 main cases were used as early as Sept. 1969. I have examples of each... The beginning of the 1970 model year the engineering drawings were change on the Muncie main case so that a fill plug and drain plug were tapped into ALL muncie main cases, so you can tell early 1970 model 660 cases, because they have drain plugs, M-20's, 21's, 22's... Hope this helps...Crash

[rszmjt]

Thanks for the info Crash,you have confirmed what i thought.
This car has a M22 with a 661 case. The car still has the protecto plate and the trans date ( on the protecto plate ) is P0E06.
Was the M22 availiable for these cars, or would it most likely have had a M21?

Thanks in Advance.

[bilede]

M-21 only I believe..

[YENKO DEUCE REGISTRY]

The M22 was installed in that car by the guy in Florida who completed the resto. All 4speed Yenko Deuces have M21's. The trans date on the POP is very early as Deuces go, but that is because this car was one of the first 15 Deuces built - even though the build date is 06A, and the next 60 Deuces are 05D.

[rszmjt]

Hi Marlin, Thanks to you and Bill for the info. Thats appreciated.
When was the resto done? I have spent the last 2 days repairing the front subframe crossmember from floor jack? damage,and also CORRECTLY repairing the rotted out #2 subframe mounts. This car is not very correct, it has a 55 chev passenger car bellhousing instead of the 621, wrong starter/dist/alternator/block/waterpump/rad/trans tailhousing/yoke/diff etc., etc.,
I have always said-IF only these cars could talk!!!
The floor is a mess, someone has changed the front and rear floor pans, not very nice, there is a lot of Bondo around the shifter hole.
Did these cars use a add on shifter hump on the floor?, or was the floor just cut out?

Actually i had presumed the trans date was probably OK, Yenko site user hugger 69 ( he posted my CTB Engine pictures) camaro has the same engine and trans stamp date and is also a 06A car , although it is a 69 camaro Z28.

Any input about this car or information regarding Deuces would be appreciated, as i am trying to get it a lot closer for a friend.

Thanks in Advance.
Mike.

[YENKO DEUCE REGISTRY]

The resto on that car was done more for driving pleasure than correctness, and according to the restorer he had a lot of fun with the local 5.0 crowd.

The engine is your standard CTB, so all of the part numbers will be the same. No hump for the shifter, just a hole punched in the center of the tunnel. The floor pans may have been changed before the guy in Florida bought the car.

[YENKO DEUCE REGISTRY]

To be anal regarding the trans hole, the sides of the oval opening are torched, and the ends are snipped! Not that we checked it or anything http://www.yenko.net/ubbthreads/images/graemlins/laugh.gif

[bkhpah]

The car was at the first SCR. I think this is the only silver Deuce ever to be shown at the SCR shows..BKH

[Schonyenko2]

I remember that car when it was in a wheeler dealer mag maybe 6+ years ago. Good color Schonye

[camarojoe]

Mike, did your friend recently buy this car, or did he just now decide to get some corrections done to it? I remember diggin' on it at SCR1... was one of a few cars sitting outside to greet us when we first arrived late at night...hard to believe that was 7 years ago already... Silver does look good on a Deuce.
http://www.yenko.net/ubbthreads/images/graemlins/flag.gif

[YENKO DEUCE REGISTRY]

This deuce has been in Calgary for several years. It was sold by the guy in Florida, and it sort of went on the auction tour for a year or so. It was in Atlantic City, then went to RM auctions in MI, but I think it eventually sold privately. I have pics of it from when it was on consignment somewhere in MI.

It has the correct rear leaf springs in it! I use a pic of that car to show guys the correct style.

[Mr70]

Can you show us those correct leaf spring pix?

[YENKO DEUCE REGISTRY]

sure, let me scan it after lunch.

[Pantera]

I don't know is this is any help but here is a pic of my unmolested '69 L-78 7,000 actual mi Nova shifter hole.

[camarojoe]

The deuce shifter holes were different since they used a hurst shifter instead of a muncie. The boot was also different, and was the same as a 69 Camaro.

[YENKO DEUCE REGISTRY]

http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif

[Mr70]

Hows that Lunch going?
http://www.cruelty.com/disneyland96/images/tl_terrace02.jpg

[YENKO DEUCE REGISTRY]

Sorry dude! I suffer from CRS http://www.yenko.net/ubbthreads/images/graemlins/smile.gif

Here it is.

[YENKO DEUCE REGISTRY]

BTW, the BB trans crossmember was used with BB shifter rods, but the small block shifter attaching bracket - ie; no 1/2" offset on the bracket!

[Mr70]

Thank You Marlin. http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif

..and my sympathies. http://www.yenko.net/ubbthreads/images/graemlins/frown.gif

"Chinese restaurant syndrome (CRS) occurs in some people after they eat foods containing the food additive monosodium glutamate (MSG) - a common ingredient in Chinese food."

[YENKO DEUCE REGISTRY]

Actually, CRS is far more serious, it means Can't Remember Sht http://www.yenko.net/ubbthreads/images/graemlins/grin.gif

[rszmjt]

Thanks to all who have replied to this post. It is GREAT to get a little history of this car for my buddy.
Marlin/Camaro Joe, Do these cars use a Hurst? or a Muncie shifter?
Actually my friend bought this car about 1 year ago from another Calgary guy who paid big money for this car.
Yes it still has the original springs with the square lumps? It also still has the flowmaster exhaust, which is going.
On another note did these cars use the crossflow muffler-aka- Camaro type?
Marlin, You mention a B.B Trans crossmember and shifter rods, this car has a small block trans crossmember, which is correct?
Also does any one know the driveshaft length? The shaft appears original, just want to know before i spend time and money detailing it and balancing the shaft.

Thanks in Advance.

[Michael4yah]

I lived in Calgary from 1961 to 64. Nice City. I hear its a bit overcrowded now. I had a population of 260K then I think. Now its near or over 1 million. I bet ole Elbow drive or MCCleod Trail is a parking lot at 5pm huh. IN 69 I was a senior in HS in So Cal when I bought a new 69 Nova SS 396/375 4spd,Black on Black. Does anyone have some photos of these 69 Yenko 427s? Thanks Michael

[Schonyenko2]

rz, It's a Hurst shifter, yes they use the crossflow muffler setup with resonators. If you're going to change back to an M21 you'll need to change the drive shaft yoke. M22s are different ie; bigger output shaft. I kinda like the M22 in mine. Nice whine Schonye

[rszmjt]

Thanks Schonyenko2,
Would you happen to know if the resonators and muffler are the same as a 70 Z28? Also what size were the front pipes and the tailpipes. Chrome Tips on the pipes like a 70 Z28?
Actually GM did make small output M22,s, this has the big output but we are changing the mainshaft and tailhousing/yoke to make it more correct, but are leaving the M22 Gearset. Would you happen to know the correct driveshaft length eye to eye for the Nova?
Marlin, In your previous post you mentioned the BB crossmember and rods with the SB bracket, is this what these Yenko Nova,s used?
Does any 1 have a picture of the original shifter they could post?
Was the Hurst shifter the same as a non consol 70 Z28 Shifter?
Thanks for all the help, this is a great site!

[hugger_69]

Mike,

There was another post about Yenko's Deuce's running last month when one was up for sale and this same topic came up in the middle of the discussion. Someone asked about the cross member and Marlin replied with:

[ QUOTE ]
All Yenko Deuces came with a BB crossmember, and you are right it doesn't make sense. BTW, it's not a Pontiac member either, which looks exactly like the BB one but doesn't have the 1/2" offset. We do not know why they came this way, but they did, and they do not have the BB engine mounts - which makes the trans mount fun to install


It was further noted that it apparently makes them difficult to install as they are out by a 1/2 inch from the crossmember mount with BB mounts.

[camarojoe]

You may want to check out the new thread in this same section that Marlin started... as for the shifer, it was a 1969 Camaro Z28 hurst shifter with small block attaching bracket and big block shifter rods. This was the "round stick" style shifter, and the handle was the same one that was factory installed on 69 GTO's with a bench seat...the boot was the same as a 69 Camaro, with a black painted (not chrome) bezel. An odd mix of factory parts for sure!
As for the exhaust, I'm not sure about the muffler being the same as the camaro, but i do know the tailpipes were not the same, the nova pipes turned down behind the rear wheels, and did not exit out the back like a Z/28. The tips were not chrome. Gardner makes a nice exhaust for these cars, and takes alot of the guesswork out. I attached a pic of my exhaust exit location, of course its the same on both sides.

[rszmjt]

Thanks Joe. That Helps.