[inspector]

The bellhousing on my 67 is a part# 3899621. I would like to know what is is supposed to be from, and could it be an issue with my clutch adjustment?....Thanks...Inspector

 

[DZAUTO]

I don't understand your question. That's the correct bell housing for a 67 that has the big, 14in diameter, 168teeth flywheel with an 11in clutch.

 

[70-SS454]

Yep x 2, Standard Big Block 11" Clutch Bell Housing... Used on a plethora of Chevrolet models...

 

[Steve R]

One came on my 71 small block Camaro. Also had 26 spline input, large output M20. Wasn't that the standard for all Muncies in 1971?

Steve R

 

[DZAUTO]

One came on my 71 small block Camaro. Also had 26 spline input, large output M20. Wasn't that the standard for all Muncies in 1971?

Steve R

Correct, in 71 ALLLLLLLLLLLLLLLLLL Muncies got the 26spline input shaft and the larger 32spline tail shaft.
MANY, MANY, MANY people in the past have MISUNDERSTOOD that the fine spline input/big tail shaft Muncies were only M22. NOT SO! And it has been an uphill battle to convince them that just because a Muncie has the fine spline input and big tail shaft, it is not necessarily an M22. But I think the message is finally getting across to most of these people.
I can only guess that the reason for this incorrect understanding is that in 1970, the Chevelle with an LS6 engine and M22 did get the fine spline/big tail shaft Muncie. But for 71, they were all fine spline/big tail shaft.

When the Borg Warner Super T-10 replaced the Muncie (1975), it also had the fine spline input/big tail shaft.