68 Yenco clone

[auschris001]

pxtx,

Here are the pics of the project I promised (finally worked out how to reduce them)

Cheers: auschris

[auschris001]

Wayne or Bob,

Did the 68 Yenko come with a 140 MPH speedo or was that just 69

and what about things like power steer, air and power windows, I know they came on SS and RS but did they come on a 68 Yenko

Cheers: Chris

[original owner]

chris, 68 yenkos had 140 mph speedo's, mine had no P.S. as allthe other ones kline chev sold in 68, also no ac, nopower steering all were ss's 4 speeds. you should really get rid of the auto. trans. They had passenger car engines ( L 36's, low comp. 10.25 to one,hydro lifters small carb,small heads, small intake manifolds, mild cams.) the factory rating wae 390 H.P. which was very high. Had this motor in a 69 vette. absolutly no where to go, to up H.P. You want a L 72 4 speed 100%. As to clones , yenkos new, were the biggest clones of all, think about this and reply. thanks Bob krueger

[SuperNovaSS]

Bob,


Are you trying to say the cars that Yenko converted came from gM with L-36 engines???

[PeteLeathersac]

As I've always understood, all '68 Copo 9737 cars were shipped w/ the unique MV Suffix 396 L78 engines installed and planned for Yenko to transplant 427/425 L72 shortblocks reusing the heads etc..
* Note not all cars were converted and some were sold and/or dealer traded w/ their MV Suffix L78's still intact..

Can anyone post the unique carb #'s shipped w/ these MV Suffix L78's?.
Also what was the factory HP rating of the MV Suffix L78's?.

[img]<<GRAEMLIN_URL>>/beers.gif[/img]
~ Pete

[auschris001]

Bob,

From what I am reading 1968 was a mix of corvette engine transplants and later that year the COPO 9737 and all 69's were COPO
Even though the torque drive was an option, it was never in a Yenko as they were all 4 speeds. I am hearing a lot were L78 396
and L72 427 and they had the same cyl head cast rect port closed chamber.(I have 2 heads #3964291 &amp; 3873858)can someone tell me which number is correct for 1968.
Now what about the L88 427 ??? is there a 1968 L88 Yenko

Cheers, Chris
ps; thanks again , someone said this would be hard and they were right.

[auschris001]

Pete &amp; Bob,

I have found at least 4 block numbers #3869942, #3904351, #3916321, and #3935439 that are 427 numbers
Q: Is there just one specific number for the L72 L88 ???

Cheers,Chris

[original owner]

Gentlemen the camaros sold in 67 and 69 with the auto tran's, had hydro, lifters, There H,P. ratings were 1967 410 H.P. 1969 425 H.P. There are no hydro. lifters on L72 427 V8's. In 1968 all camaros were m21 4 speeds, with L72 427's The L36 was producted according to G.M. from 1966 to 1969. G. M. futher states that the L36 was ment for large pass. cars,, med. trucks, but also found it's way into corvettes, plus the large body bel air, Impala car's in the late 60's.the same motor with 3x2 barrels in a vette was rated at 400 H.P.With a diff. L number.I had one in 69 an L36. As to 67's,most had the blocks changed at dealer(yenko) except auto trans cars.Factory built that way,the tranny's of the day had a very hard time in auto form handling the H.P. of the L72. All 68's had 4 speed m21's,L72's(as all the three year's should have had, no auto's) And the majority of 68,s had the L72,s FACTORY installed and all 69's.This comes from several people who I talked when I worked for chev. in the mid 70's,who worked on this project for chev. yenko over rated the H.P. in the 68 camaro's from 425 to 450 also the 69's, the same. the auto trans camaros were also over rated. 67 from 390H.P.to 410, 69 from factory rating 390 to 425 yenko H.P.?The 68 4speed camaros, L72 factory 425, yenko 450H.P.But in his defense he did modify them some. never heard of a L-88 yenko camaro, but thats just the ones I saw shipped to minnesota. Question of the day whats a ZLX 427 chev v8. thank you Bob krueger.

[budnate]

http://mecum.com/auctions/lot_detail...D=SC0509-79421

Hey Bob...in answer to your question of the day, the ZLX was a Motion promoted big block configuration ....L88 shortblock with iron open chamber heads.

Additionally, I don't believe the L36 was <span style="text-decoration: underline">ever</span> intended for medium duty work. Medium duty trucks had 366 and 427 tall deck engine configurations; 10.200-inch deck height versus a passenger car deck height of 9.800-inches. As many are aware, the extra deck height was incorporated so that a four ring piston could be used on the medium duties.

None-the-less, thanks for the Memories! [img]<<GRAEMLIN_URL>>/smile.gif[/img]

Wayne