Welcome K1:
Haynes manuals have the info you need.
Per my copy: 351-W and lightning- Main bearing oil clearance (standard)= no.1 bearing.......0.0001 to 0.0015 inch
all other bearings......0.0005 to 0.0015 inch
rod bearing oil clearance (standard)= 0.0008 to 0.0015 inch
rod bearing side clearance............0.010 to 0.020 inch
crankshaft end play.................0.004 to 0.008 inch
Hope this helps.
Good Luck