1967 Bellhousing

[Mark K.]

I have a question about a correct bellhousing for a 67 small block [L79]. Is the casting # 3899621 correct for this application? Or is this a 'big block' only casting number? I have been told that the 621 number is big block only. Any help would be appreciated. Thanks. Mark

[William C.]

Re: 1967 Bellhousing

BB only for the 621, unless you count later 350 engines that used the 11 inch clutch setup.

[Joe L.]

Re: 1967 Bellhousing

Mark------

1967 small blocks used bellhousing GM casting #3858403. 1967-69 L-88/ZL-1 used this bellhousing, too.

As Bill mentioned, for 1967-68 the 3899621 bellhousing was used for big blocks only as far as Corvettes go. From 1969-81, it was used for almost all Corvette applications except L-88/ZL-1 and 70-72 ZR-1.