1970 deuce

[COPO 70 RS/Z28]

Were all the 70 deuces built in June ???
were they all built as a group????

Thanks

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

[mockingbird812]

Some of the info is here:

'70 Yenko Nova Inventory Info (http://www.yenko.net/ubbthreads/showflat.php/Cat/0/Number/75999/an/0/page/0#Post75999)

The sage wisdom will chime in with more info...........soon http://www.yenko.net/ubbthreads/images/graemlins/naughty.gif

[camarojoe]

Marlin is the man with the numbers, but I'm pretty sure all were either 05D or 06A builds.

[MikeA]

...and 6B

[COPO 70 RS/Z28]

on the chart what does MSO and COMP DATE signify??

Also I have read that thy used a LT1 from a vette vs a camaro

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[Schonyenko2]

There were two separate batches built. the first 125 were in equal numbers of cranberry red, fathom blue, forrest green, cortez silver, and gobi beige. They went to Yenko for stripes, and finish. those corrolate with the first date Joe mentioned, The second batch were sent to Hurst for finishing. I doubt that many of those ever saw Cannonsburg. Those are the ones that go with the 2nd build date Joe and Mike stated. That order had the 10 huggar orange, sunflower yellow, and citrus green cars. Referred to as "spring time color offerings". Also 10 more CR, and 10 FB to round out the 50.
Deuce motors are stamped CTB, or CTC, which denotes 70 Z28 4spd, or auto. The deuce add calls the motors Corvette type with 800cfm carbs. Neither of which are correct. I did believe that when I bought mine that it had a Corvette motor. It wasn't until later, after meeting Marlin, that I learned it was a Z code. Don still wanted you to believe that he was doing the transplants. And the info he printed wasn't always the exact truth.

[bkhpah]

There is no doubt some of the spring time colors saw Canonsburg. There were a few of those colors sold at Yenko..BKH

[Salvatore]

[ QUOTE ]
on the chart what does MSO and COMP DATE signify??

Also I have read that thy used a LT1 from a vette vs a camaro

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

[/ QUOTE ]Wern't the Vette LT-1's and the 70 Z/28's the same motor? Were they not built at the same place and stamped with a Yenko Deuce code?

[Mr70]

Sam
I've always understood the difference between the two was their gross horse power,do to different exhaust manifolds & notated with seperate suffix codes.
1970 Corvette LT-1 350/370HP coded CTU/CTV used Ex.Man. LH-3872765 & RH-3932461.
1970 Camaro LT-1 350/360HP coded CTB/CTC used Ex.Man. LH-3942527 & RH-3946826.

[COPO 70 RS/Z28]

The reason I was interested in the vette/z28 issue was part numbers? I was curious about part numbers for the deuce that followed the Z but read that the deuce had a vette LT1

so now it's making more sense to me.

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[Schonyenko2]

[ QUOTE ]
There is no doubt some of the spring time colors saw Canonsburg. There were a few of those colors sold at Yenko..BKH

[/ QUOTE ]

Absolutly. A very rusty SF yellow one setting in a mud puddle comes to mind. That was a Yenko dealer car. But many like mine, and the Halverson deuce, actually that whole transport load, were shipped direct to the dealer network. Cronkleton's falls in there somewhere being a Ericksen sold car and a Hurst finish.

[Schonyenko2]

[ QUOTE ]
[ QUOTE ]
on the chart what does MSO and COMP DATE signify??

Also I have read that thy used a LT1 from a vette vs a camaro

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

[/ QUOTE ]Wern't the Vette LT-1's and the 70 Z/28's the same motor? Were they not built at the same place and stamped with a Yenko Deuce code? [/quote )

There wasn't a Yenko deuce suffix code per say. The COPO power train was a Z28 LT/1, M21, and CBW rear. In the advertisemant Don calls out a 370hp Corvette type motor. I believe he did that so he could say that a deuce had more hp than a Z. Remember too, that most people believed back in the day, that the 66,67 Chevy 11 L79's were corvette motors.

[camarojoe]

Hell, til this day every car (or truck!) in Johnstown, PA with a 350 in it allegedly has a "Corvette motor".... http://www.yenko.net/ubbthreads/images/graemlins/smirk.gif

[ORIGLS6]

That same malady affects people further West as well. http://www.yenko.net/ubbthreads/images/graemlins/tongue.gif

[1967 Impala]

[ QUOTE ]
Hell, til this day every car (or truck!) in Johnstown, PA with a 350 in it allegedly has a "Corvette motor".... http://www.yenko.net/ubbthreads/images/graemlins/smirk.gif

[/ QUOTE ]

It happens in Canada too,lots of Vette motors here http://www.yenko.net/ubbthreads/images/graemlins/burnout.gif http://www.yenko.net/ubbthreads/images/graemlins/3gears.gif

[Salvatore]

I believe GM rated the Vette motor (LT-1) higher than the Z because their premiere car was NOT going to have the same or less hp than the second stringers. Camaros, Deuces etc. The L79 motors in the 65,66,67 chevelles and the 66-67 chevy 11's were the same as the vette. Same components anyways I believe. What was different the oil pan in the chevy 11's? Speak to me I learn more stuff everyday!

[Jeff H]

[ QUOTE ]
I believe GM rated the Vette motor (LT-1) higher than the Z because their premiere car was NOT going to have the same or less hp than the second stringers.

[/ QUOTE ]

Or did they rate the Z28 motor lower so the Vette would still be the top performer? http://www.yenko.net/ubbthreads/images/graemlins/wink.gif

[COPO 70 RS/Z28]

I thought that chevy wanted the vette to remain top hp dog for marketing reasons.

[Salvatore]

Jeff and Carl, I think I said that! http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif The Vette ruled the roost for GM. That is why Chevy quickly took the 6 banger out of the 55 vette cause the double 5 chevy had a bigger, more hp motor. http://www.yenko.net/ubbthreads/images/graemlins/3gears.gif

[Johnny Horsepower]

[ QUOTE ]
I believe GM rated the Vette motor (LT-1) higher than the Z because their premiere car was NOT going to have the same or less hp than the second stringers. Camaros, Deuces etc. The L79 motors in the 65,66,67 chevelles and the 66-67 chevy 11's were the same as the vette. Same components anyways I believe. What was different the oil pan in the chevy 11's? Speak to me I learn more stuff everyday!

[/ QUOTE ]

I always thought it was keeping the vette top dog and the 10 HP dif was open element air cleaner vs the dual snorkel... http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif

JG

[COPO 70 RS/Z28]

I think there was also a more restrictive exhaust on the z also

[Mr70]

There was and it started with the Ex.Manifolds.

[ QUOTE ]
Sam
I've always understood the difference between the two was their gross horse power,do to different exhaust manifolds & notated with seperate suffix codes.
1970 Corvette LT-1 350/370HP coded CTU/CTV used Ex.Man. LH-3872765 & RH-3932461.
1970 Camaro LT-1 350/360HP coded CTB/CTC used Ex.Man. LH-3942527 & RH-3946826.

[/ QUOTE ]

I also have an inhouse 1970 Chevrolet Technicians Diagnostics Specifications Catalog dated February 1970,that shows individual engine outputs and peak levels.
The Corvette LT-1 clearly shows 370HP @6000RPM w/peak torque of 380 @4000RPM while the Camaro LT-1 shows 360HP @6000RPM w/peak torque of 380 @4000RPM.

[COPO 70 RS/Z28]

So was the deuce running standard exhaust etc. or were they running open element & performance exhaust

Also were all the deuce motors close in build date or did they very dramatically???

[Schonyenko2]

[ QUOTE ]
So was the deuce running standard exhaust etc. or were they running open element & performance exhaust

Also were all the deuce motors close in build date or did they very dramatically???

[/ QUOTE ]

Deuces ran the Z dual snorkle air cleaner, and a stock exhaust system with the Z manifolds.
The build dates were usually very close.

My comment on the L79 Chevy11's comes from the urban legends back in the day, that those little box deuces that slid up beside you late at night, and blew your door off were somehow ordered, or transplanted with corvette motors. Remember, Bill Thomas started doing that with some of the 1st gen Chevy 11's.So there was a lot of rumor about factory, vrs transplant.
Don was a SCCA racer. Way more into Corvettes than Z's. Plus why buy a nova with a Z motor, when you could just by the Z. Cheaper. Marlin also has a theory that Don built the deuces with an eye on possible trans Am racing. Hence the suspension COPO. And if you take the stripes and flip them around, they look like Boss 302 stripes. Sorta.

[Salvatore]

Wouldn't the Deuce manifolds be the same as the SS 350/300 novas for 1970? I also can't believe that there were much if any restriction differences from the 70 Z/28 manifolds and the LT-1 corvette manifolds. Same size but a little different shape to fit the frame? Dollars to donuts GM did not design a better flowing exhaust manifold for the corvette just to say it has 10 more hp. They gave it 10 horsepower to put it tops in its class. Its called advertising. http://www.yenko.net/ubbthreads/images/graemlins/3gears.gif

[Mr70]

The 350/300Hp Novas used the same design manifold as the Deuce,only it wasn't drilled for A.I.R. so reflected a different casting #.Used on SB in the 69 model year as well.
The 370HP LT-1 Corvette used a center straight out exit manifold,while the 360HP LT-1 Z/28 Camaro-Deuce used a rear out exit.
Twinkies to Tastykakes..