Personally - if it was my S/C, I would disassemble the whole thing, take the shaft and have it machined to accept one of these:

https://sdp-si.com/eStore/Direct.asp?GroupID=551

Alternatively go to Mcmaster.com - Flexible Couplings, and check out their spider couplings

or shear couplings


Both options are cheap - you just need to do some GOOD (i.e. not on your bench grinder!) machine work

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!