two bolt BB vs four bolt - The Supercar Registry

04-25-2016, 08:22 PM

Zman1969 Zman1969 is offline

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Re: two bolt BB vs four bolt

I thought the oil plugs along the side of the block were a little larger on the 4 bolts - IIRC
?
that and the 1" oil plug on the side - I know now that the later 4 bolts are not made that way anymore maybe because the oil filter adapter coolers that became avail in the '80s? I have a 90 or so LS6 454 4 bolt crate engine that doesn't have the big plug

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