BBC Crank Pulley in Steel like original - source?

[tucsonjwt]

The crank pulley fell off my 454 C20 for the second time. Two bolts worked loose and spun the crank off - cracked the pulley. I have tried an aluminum replacement when the first one broke, but the v belts would never stay tightened. I found a used OEM steel pulley, but now I need a second one.

Does anyone know of a source for a steel pulley?

Should loctite be used on these bolts? If so, what kind? Also, any recommendation on replacements bolts? ( I only have one left.)

Part number stamped on part is 3937787-AC. It is a 3 groove pulley - about 7 3/4" diamater and 2 3/4" bolt pattern.

Thanks.