Hello,

Will big bore head gaskets be necessary for a 3.875 bore?

Also;

What are the ideal deck clearances for shim head gaskets and composition gaskets? I'll be using either posted G or 471 heads. The Gs will go on a 292 B9AE block bored .040 with a 312 crank with flattops. The 471s will go on a ECZ 312 bored to 3.875 with 17cc domed pistons for which I'll need the composition gaskets. (Do I figure .041 thick?) I'm shooting for about 10-10.25/1 compression. I plan on using an Isky RPM 300 (228 deg.@.050) in either combination. I need to decide which way to go for a hot street engine for my 57 Ranchero with T-85 O.D. and 4.30 cogs. Any help will be greatly appreciated!

And will a modern paxton blower bolt to the OE F code bracket? Just curious.

THANKS!

FIGHT CONFORMITY!