Quote: Why would my motor feel like it has more power with my 346 heads shaved .030 vs the new 440 source heads? It has KB 400 pistons and both heads had the same head gaskets.
What head gasket? The stealth heads need to use the larger diameter head gasket. The fel-pro 1009 has too small a bore diameter. The standard Fel-Pro rebuild kit gasket 8519-PT seems to fit OK with the stealth heads.
