This weekend I scored two bellhousings. One is 3849309 which comes up as a 64-66 bellhousing; the throw out arm is located at 7:30 when viewed from the back. The 621 throwout arm is at 9:00. I'd like to use the 621 if I can get it fixed (see below) but the difference in the throw out arm has me concerned. Has anyone put the 621 in a 64 with SBC and do you have any pictures so I can see if there are any clearance issued with the change in the acuating arm?

Also the 621 has suffered from a clutch explosion and has three holes in the spaces between the ribb ranging in size from a quarter to dime. I got it for free so I can put some money into getting it repaired. I assume running it with out repairs is just asking for a place for it to crack more.

Thanks for the help.
Patrick

The 309 bellhousing is a 64-66 nova V8.

I just installed the repro 621 bellhousing in my '65 behind a brand new, yet to be started 350 crate motor. I had trouble with the throw out bearing clearance from the pressure plate fingers. After replacing the pressure plate with a Ram diaphram unit, that problem is solved. I have not finished hooking up the rest of the clutch linkage yet. The fork is at the correct angle. So, I am not expecting any more problems.

I'm not sure I would bother with the 621 bellhousing with holes in it. The thing might have lots of cracks and stresses that would only be detected by magnafluxing it. Who knows how much it would cost to have someone weld patches over the holes. I only paid $170 for a brand new repro from Ausleys. It just seems like the bellhousing is the wrong kind of part to risk metal stress related failure. But, that's just me.

Patrick that 309 is worth more than the 621 to a Nova guy in need of it. You could ebay it for more than a scattershield costs and using the scattershield is far smarter than messing with an aluminum bellhousing. I have both and the 621 will be hung on the garage wall. The Nova doesn't make a lot of power but having that clutch spinning at 5000 rpm inches from my legs makes me nervous. The scattershield gives me a sense of safety.
I know you aren't running your 64 hard enough to think you need one, but we only get one set of legs.

Thanks for the comments. I've actually been in a 55 chevy when the clutch hand grenaded. Punched holes in the hump, dash and broke the windshield, luckily we didn't get hurt. From then on when the 283 started winding I'd put my feet up on the seat. I'll contact the donor (brother) and see what he wants to do with the 309. That also explains the different arm location, they must have a differnet ball location on the blocks too. I told him I'd pay him fair value for it but I've seen them go for $250+ on ebay, 621's go for about $175, 10.5" ones $25-35. I don't plan on racing so with the right disc and pressure plate the small clutch setup should be adequate, I certainly abused my share of them in the 60's much harder than I will run the current Chevelle.

Patrick that 309 is worth more than the 621 to a Nova guy in need of it. You could ebay it for more than a scattershield costs

They are not worth that much, as the 309 was used in ALL manual trans Novas from 64-67 including 6 cyl 3 spd cars.

I bought one for my '65 Chevy II on ebay about 4 months ago for $100. I saw several others in the same price range when I was looking.