JBK E n t e r p r i s e s
How I converted my car from gas to electric
To couple the 9 inch ADC electric motor to the transmission I needed to go from a 1 and 1/4 inch keyed shaft to a splined shaft on the transmission.

So I  took an old clutch plate and ground the rivets off,

Turned off the rest of the piece till I could turn the OD to the 1 and 1/4 inch to fit a coupling I got from McMaster Carr...

One and One quarter inch  on each side...Keyed...
My Electric Vehicle Project!