I believe the bolt is a 3/8"-24 which would be tightened to 30-35 ft.-lb. or so. Be aware it's possible to put a twist in the connecting rod while tightening the pinch bolt if the rod is held in a vise while the bolt is being tightened. Find a pin punch that's a close fit into the hole in the wrist pin, clamp it into a vise, and slide the pin over the punch to anchor the piston/rod assembly while the pinch bolt is torqued.
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!