Engine mounts - 20 to 30 lbs. ft. (AIM)
Flywheel to crank - 55-65 lbs. ft. (Chilton's Manual)
Clutch cover to crank - 35 lbs. ft. (http://www.boxwrench.net/specs/chevy_bb.htm)
To be honest I don't think I've ever used a torque wrench on engine motor mounts. I just snug them up with a 3/8" drive socket and little bit of Loctite.
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