one piece Felpro Pan Gaskets

[jcfoote60]

OK guys..........I have been shopping Summit and am looking at the one piece Felpro pan gaskets and for 1972 it states with "thick" front pan seal... my block is a 4 bolt main original 72 block... the front seal is what I have seen in the past...does anyone know the difference in "thick" vs "thin" when it comes to front pan seals?

Part numbers for those of you doing the one piece on a 72 4 bolt main block?

I understand the one piece is awesome over the old school 4 piece leaker style...............

JC