Any auto parts store will have a plastic clutch alignment tool, either for sale or loan, and most clutch/pressure plate kits have one included in the box. The same clutch spline was used by Chevy for over 40 years on most applications, 6 cylinder and V8.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!