Hot Rods Clutch turbo

B&M clutch turbo Anyone know what clutch bearing it takes measures 1 5/8 in. Stock Chevy s 1 3/8 can't find a bearing anywhere .

 

what is that dimension? height? ID? or????

 

I don't have a bearing the ID is 1 5/8 it needs to fit inside the spider looks like standered Chevy OD I can measure the spider that engages the pump when I get home

 

In this picture the spider is on backwards

 

I was thinking that also..

 

I've been thinking a lot about clutch-autos recently, and the more I do the more I'm convinced that there must be a better way than that spider arrangement. I don't know what it is, though.