hay, 350's are like flys - they're everywhere - but a nice 283 w/ the original front peg mounts nested where it was designed to be is gettin to be unusual
283's are good strong motors w/ good lo end torque + the ability to rev well, and can be tweeked a million ways - if ya want a bit more oomph make it a 327, tho they're a bit more 'high strung' and aren't as likely to last forever
Bill