bobhadd71

I am working on a '72 cutlass that has a 350 combo in it now. But I want to install a 425 and a 4 speed, Here is my Question,
1. IS it true that all I need to do to install a 4 speed to my 425 (out of a '67 starfire) in to my cutlass is to get a bellhouse, I already have an dual pattern Bellhousing (chevy and BOP). WIll this bellhousing work. I will need to get the crank drilled for the bearing?
2. What about a flywheel, Is there a certain one I need.
3. What about the master and slave cylinder?
4.Has anyone out there ever done this combo before?
5. Are there any thing I missed?
Any help will be apprecatied

Thanks
Bobby

joe_padavano

Dual pattern manual trans bellhousings are somewhat rare. Be sure it has the notch for the starter on the driver's side. If it's a Chevy/Pontiac bellhousing it may only have the notch on the passenger side.

Yes.

You need a 64-67 manual trans flywheel. The crank flange bolt pattern is different on the 68-90 motors.

That's if you want a hydraulic clutch. The stock setup was a mechanical clutch with a bracket that bolts to the frame (they are available repro) to support the outboard end of the Z-bar. Of course you will need the pedals. If you want a hydraulic clutch, consider a hydraulic throwout bearing instead.

The 425 is no different than any other BBO in this respect.

What trans are you using? If it is a different length from the one you have now, the crossmember will move, which changes the required length of the front and intermediate e-brake cables (since they hang off the crossmember). Of course there are lots of little details like speedo cable, shifter, backdrive linkage (if you want the backup light switch to work), clutch safety switch, and driveshaft (if the trans lenght is different).

bobhadd71

The bellhousing does have the humps on each side.