Original 307 Bellhousing Clutch Size 12"????

[dan468]

I have the original bell housing to my 1972 307. Can this fit a 12" clutch assay? I'm mating it to a gen IV 454. Are all the flywheels the same size and just the clutch sizes different?

Thanks,
Dan

[LONGHAIR]

It depends on the 'wheel, some have both bolt-hole patterns, but I have seen them with only one. Bellhousing, I am not sure, but I would think so.

[dan468]

Originally Posted by LONGHAIR

It depends on the 'wheel, some have both bolt-hole patterns, but I have seen them with only one. Bellhousing, I am not sure, but I would think so.

I'm mostly concerned with the big block flywheel. I don't mind using a 10.4 or 11'' clutch/plate

[cparman]

might need some help here? The flywheels on ALL chevys are either 153 tooth, or 168 tooth. The physical OD cannot be that much different I would think. SO, if I am correct the flywheel should fit??

[dan468]

Originally Posted by cparman

might need some help here? The flywheels on ALL chevys are either 153 tooth, or 168 tooth. The physical OD cannot be that much different I would think. SO, if I am correct the flywheel should fit??

that's kinda what i was thinking too and pretty much all 454 flywheels are 168.

[LMN8UR]

Originally Posted by dan468

that's kinda what i was thinking too and pretty much all 454 flywheels are 168.

My '72 was originally a 307, the bellhousing is the same one used on most / if not all manuals from 67-72 Cast #3925505. . . I currently have a 168 tooth flywheel with an 11" clutch. I was shopping for a new flywheel and clutch, and according to Summit I can put a 12" clutch under the bellhousing (As previously stated, depends on the flywheel holes.)

[dan468]

I just ordered the 12'' dual friction from centerforce with 26 spline input. We'll see how it works.

- Dan