Haven't heard that, not sure why you'd need to anyway. Main caps aren't hard to find for the 392's because a lot of people swap them out for aftermarket billet stuff. The blocks are actually pretty close to the "A" block, which then became the "LA" block so some stuff does crossover. There's a modification to the 340 HV oil pump that allows them to be used on the early hemi's. LA distributors can be used if you adapt the length of the shaft to match the deck height, although on a 241/270 Dodge hemi the distributor drops right in. Balancers can be used if you re-broach the keyway for the hemi.
