68 Yenco clone

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

[original owner]

Wayne, close but not accurate.This is from chevrolet, ZLX, 12.25 comp. L 88, ZL1, hybred.Iron block, alum. heads. In house use only, not sold. motion no thing to do with this motor.produced from late 60's to around late' 90's(chev alittle hazy about end date) only used for experimental purpose. end of the line for hi perf. 427's. most H.P. of all but unreliable. From chevrolet, also l-36 , desighed as a big block of medium H.P. for the use in the heavy sedan;s coupes they planed to build, and also as a motor for med. duty trucks, because of the broad torque band. Used to work for chev. back in the 70's, 80's. had chev monte carlo demo's 454, 345 H.P. chevy also used med H.P. 427,454. motors in there own brand of motor homes, in the 70's. remember those? Those were the days my friend , we though they would never end but. Thanks Bob krueger

[SuperNovaSS]

Bob,

I think your info may be a bit incorrect. the ZLX was installed in Motion cars. It was also availble to all buyers over the counter.

I also believe all 68 Yenkos started as L78s. 67s were available as 390HP.

There are many sharp cookies on this board. Try to back up your statements with facts.


Jason

[RPO LS7]

[original owner]

My info came straight from chevrolet, the complete motor was never put on the market unless the history depart. has slipped a gear? Never heard of a car with that equipt, back in the day? chev stated that research was done on types of that motor till the 90's. the add could be what the industry called a teaser, to test the market for aproduct.AS 1970 was the last year for the high H.P. motors. as the ad reads that motor would have way over 700 H.P. Any info about a real ZXL car? Thanks Bob krueger. motion was the seller, not the producer in the ad.

Uhm Bob...

I'll stick to my answer on both the ZLX and the Medium Duty Truck engines.

Wayne

[RPO LS7]

<span style="text-decoration: underline"><span style="font-weight: bold">FWIW</span></span>, Volume 12, Number 9, September 1973 Popular Hot Rodding magazine.

[Xplantdad]

FWIW II...

Assembly line photo of some &quot;W&quot; engines at the assembly plant....courtesy of LIFE magazine. It shows that Chevy painted most everything including the exhaust manifolds.








From first hand accounts of people who worked in these plants...there was a &quot;mask&quot; of sorts that was haphazardly placed over the aluminum intake area on the big blocks while the engines were sprayed...so over spray did indeed get onto the intake and heater bypass hoses. After all, Chevrolet was in the business of building cars...not restoring them [img]<<GRAEMLIN_URL>>/smile.gif[/img]

Plus, there are many documented examples of low mileage unrestored cars that still have the over spray on these areas!

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

[Belair62]

Pretty neat pic Bruce. Never saw that before.Looks like they only missed hose ends of water pump ,thermostat housing and water pump pulley flange face on these. By pass hose looks to be installed after paint too. Odd.

[x Baldwin Motion]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RPO LS7</div><div class="ubbcode-body"> </div></div>

Just noting the above ad lists cast iron heads, not aluminium. More than one recipe for ZLX or ZL-X