ZL-1 block versus Can-Am block?

[John Brown]

I don't think the Can-Am blocks had any provisions to mount a fuel pump on the block either.

[Kim_Howie]

I don't think they have side motor mount bosses. From what I can remember on them.

[Kim_Howie]

The motor that was in my 70 Camaro was a Can Am motor. Dave libby told me that it was. The pictures taken in 1970 prove that. The block had no winters flake on it and has a fuel pump where the fuel pump mounting boss is.

[John Brown]

From CRG.... http://www.camaros.org/copo.shtml talking about ZL1 production engines vs Can Am engines.

[ QUOTE ]
In production form, the engine differed from Can-Am configuration. The dry-sump oil passage was eliminated and provision for a mechanical fuel pump added. Production tooling was developed for the block (castings #3946052/53), cylinder heads (#3946074), and intake manifold (#3933198). A new aluminum water pump was to be included (and at least one and perhaps two Camaros were built with it), but last minute testing raised reliability questions.

Chevrolet continued to develop the Can-Am version of the aluminum big block for racing, progressing to a liner-less 390-alloy block buildable in displacements of 430, 441, 494 and 510 cubic inches. These did not have provision for a mechanical fuel pump. They were never used in production and few were produced.

[/ QUOTE ]

[Kim_Howie]

Here is a pic taken by Jon Asher in 1971. please note no winters flake & fuel pump boss.

[Charley Lillard]

What's this ?

[Kim_Howie]

Kinda looks like some #s cast in alumium. Other than that have no clue.

[olredalert]

----Charley,,,Is the second 7 really a seven??? It is obviously different than the other 7. Just wondering........Bill S

[William]

The true 'Can-Am' block is the unit Hot Rod magazine did a tech feature on in the Sep 1972 issue: no liners, no fuel pump.

Can-Am racers did not use the standard fuel pump so if an aluminum block has the provision it's not the Can-Am version.

[chet urbanek]

Here is some information on Yenko's ca am engine, I have owned this engine for 40 years, bought from an old drag racer, whose name is long forgotten. The engine now sits in my 1969 camaro, some call it a Yenko ZL1. It has the 4.44 bore with a 454 steel crank, ( near 500 c.i. ) The casting seems to read 3946052, same as a ZL1. I was told this is an early engine, that when Yenko bought the molds, chevy told Don to lose the winter snow flake, but forgot to tell him to change the casting number, which Do did changing it to 3946053. This engine has ZL1 aluminum heads, intake, with a 850 holly carb. pictures to comeAttachment 118460

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