[makoshark]

I have a 4.040" block, I didn't want to use a .015" shim, my block was decked and the pistons were .015" in the hole, the motor had been through a few heat cycles with the iron heads, and I went to aluminum, my friend said .015" would be fine, another buddy who races gave me some .015" shims for free, but said to use them at my own risk, it seemed like he didn't want me to use them, so I found a set of .025" composite gaskets with a 4.060 bore and they work great so far. The brand is Vitor-Reinz or something, which I think is a fel-pro brand. Someone on here posted a link in one of my old threads. I purchased them online through the link.

What kind of pistons are you running? Flat tops with valve reliefs?