1972 buick 350 real seal

[Rory McNeil]

Originally Posted by Chuck Norton

That's priceless!! An old-time rebuilder advised me that a rear main seal for a 312 Ford would work in an Oldsmobile 307 and that the rope seal could be avoided altogether. Didn't believe him until I tried it.

c

Interesting, every Ford 312 I ever rebuilt used a rope rear main seal.
They did have a pressed in rubber seal in the front timing cover however.