700r4 yoke too, thm200c,
basically all gm trannies are 27 spline output except for 4 speed toploader trucks(sm420 and ch465 etc,) and th400's 32 spline
i put a 12.5" plate and starter from an 80-up 305 engine on my 1968 250 engine and it works great, its the starter nmose with bolts inline, one short bolt and other long, i have all the parts i saved them off the 250 yesterday when i loaded the engine up for scrap, saved the manifolds and other parts too, engine got water in it it was a remanufactured one, fixable but i cant right now,. so to shredder it goes,
if you need plate and starter i can mail them to you, they are in excellent shape the engine was a good runner
good luck
