ZZ572 fitment 70 Chevelle

[4MuscleMachines]

I have an opportunity to purchase a new ZZ572 for about 40% off retail and am considering putting it in my newly acquired project 70 Chevelle. The problem is I want to retain the stock cowl induction hood. Since the 572 is a tall block, does anybody know if it will fit under the stock cowl hood? Will I have to setback the engine any? What other problems will I encounter? I really do not like the Goodmark 2-4" cowl hoods....Thanks for helping..

[wickedmotorhead]

Not sure how much taller the the tall blocks are, but you will want to run a minimum 3" (preferably more) air cleaner on that size of a motor. I have a 3" on a standard BBC with a 4" cowl harwood and it clears only by about the thickness of a quarter. So you will for sure have to get some crazy drop base air cleaner, but my gut feeling still says it will not clear the stock cowl hood. I don't like the big cowls either.

Shane

[ProdigyCustoms]

It will clear, they are only a half inch taller. Just watch out for super tall intakes, and you may need a slight mushroom base air cleaner and a filter top. Headers may be another story. You may find yourself buying $1200 Lemons headers for the tall deck!

[wickedmotorhead]

Oh yeah I forgot to mention that I have a tall intake and a 1" spacer. Sorry. Yeah I agree it should clear with an intake like a performer RPM or similar.

[Addicted69SS]

4MuscleMachinesMan, I am also thinking about a 572 620hp install into my 1969 SS Camaro. I too am concerned about clearance issues. But the thing that caught my eye was the 40% discount???? Could you let a fellow Hot Rodder in on that????
You might want to look into headers for the 572, Dynatech is the only company I found so far that has them for a tall deck big block in a Camaro. Not sure about a Chevelle.

[andrewb70]

The new Team G Weiand manifolds are very nice and they are not overly tall. The tall deck, rectangular port, 4500 flange version I believe is PN 7624. Don't look for details on the website, but I believe they are shipping.

Andrew

[4MuscleMachines]

I gave up on the tall block 572, it was a one time deal from a fellow PT'er who was selling it, it's long gone. I still have the rolling chassis Chevelle and I am contemplating a Shafiroff 540 instead. No install headaches and more HP from the 540, probably less weight too.

[lftnwhls]

I have been at a shop where they dyno big blocks almost every day and the guy there told me that standard deck 540's don't make the power they should because of the rod to cylinder wall angle. As well as they wear out sooner than a tall deck 540. He had two motor's with the identical cams, carbs, distributors and the 502 made more HP per cubic inch than the 540 standard deck I witnessed it first hand.

Just a suggestion do with it what you please.

[EFI69Cam]

I have been at a shop where they dyno big blocks almost every day and the guy there told me that standard deck 540's don't make the power they should because of the rod to cylinder wall angle. As well as they wear out sooner than a tall deck 540. He had two motor's with the identical cams, carbs, distributors and the 502 made more HP per cubic inch than the 540 standard deck I witnessed it first hand.

Just a suggestion do with it what you please.

Rod to stroke ratio on a 454 is 1.53 with stock rods.

On a 540 with 6.385" rods and 4.25" stroke its 1.50

Not a whole lot of difference really. I'll take the minor decrease in R/S ratio over the install problems with a tall deck any day.

[John McIntire]

I have this motor, but it is going in my 72 chevelle, basically the same thing as a 70. I also have a factory steel cowl hood. It all fits under there, but I have a EFI intake on it, an it fits in there, very snug. Custom headers are a must. Check out team chevelles website, and do a search. I found a lot of great info over there, such as what kind of oil pan, pump, and pick up I needed etc...