I'm restoring a 68 camaro and I just bought a new stroker motor for the car. I need to buy NEW motor mounts.

There are two different types.. a 2 and 5/8 or a 2 and 3/8.. which one am I suppose to buy?? The guy said I should measure my frame to find out but I haven't taken apart the old motor just yet and cant get down to measure it!

Does anyone know which motor mount i use??

I'm starting my restoration within these couple weeks so I need to know ASAP!!!

Thanks for the help.