I just went through this after I broke a stock case with a JW ultra bell.

I bought my Reid case through Summit racing after talking to the guys a Reid. Very happy with my decison. It was a bit more expensive than the ATI, but I think it may be a bit better quality. and I recieved it the next day after ordering. I surely didn't want anymore JW junk.

The Reid bell sockets onto the case and is held on with 8 bolts rather than the pump bolts. By doing that it makes it large enough to run the 168 tooth Chevy flexplate if you want too.