Ok, 1039 is a composition gasket, the 1105 is a steel core laminate. I'm deciding between those 2, which one is best for my 400 block and 440-1 heads?

I'm gonna avoid the 1009, too many horror stories of them overhanging the bore.

But I'm also still wondering what is 'wrong' with the Mopar P4349559 gasket??


1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual