I do think to have a rad shop clean it is a good idea.For one other thing to consider is what junk that is flushed of the tank,it would be their responsibility to dispose of and not yours which to do that properly would be a problem.

I do remember Monza's V8's which where 305's.What I don't remember is if those still had the block forged with the ability to mount a mechanical fuel pump.I saw you asking about that in the other thread and thought you might want to check that out.