edzolz

Anybody ever heard of these? Branded Perfect Circle. They are forged with a 7cc dish and standard size. I am going to use them to rebuild a 66 E block 400.

66SportCoupe

I have a set going in a 355 olds right now. Good piston. Should be about 9.5:1 in a 400

cutlassefi

Or you could use a waaaaay better piston, the Mahle 4.065 that’s available now. It’s forged, coated, has a much more modern ring pack, 10cc valve reliefs and is .013 taller than the L2321 for better squish without surfacing the block or using an expensive mls gasket. Just a suggestion.

67OAI

Ed, I have always used the L2320F piston for an inexpensive rebuild, same as L2321F but flat top and generally less expensive. No problem with an 80 CC head and .042" gasket. Just my opinion.

edzolz

But why spend $300 to $400 bucks for a different piston when I already have these. Not building a race motor, just for a nice driver.

cutlassefi

Didn’t realize you already had them sorry. And the Mahle isn’t a “race piston”, it’s just a better piston in a lot of ways.

skyhigh

It would cost you double that for a new alum pistons, its not chebby pricing where you can get pistons for 300.