Well Rob, you may have been bummed about that 51, but where did you find a 74 so clean without all that cancer in the usual places here in this area? Everyone of the 73-79's I've seen (unless it's been restored) has some rust over the fendwells, and some in the cab corners/rockers. I'm sure you could make that 390 scream.
Jake
Dial-up sucks. It's taken me 45 to upload 4 pics into my gallery......