I'm a slow learner. My oldest son & I built 2 V8 Vegas. A 1971 was the first. It had a 327 & a Powerglide out of a 1964 Impala. The second one had an earlier conversion that was so bad all we saved was the radiator & did it over. First motor was a 327, the second was a 406 Cu.in. with a 350 Turbo trans. Wore out the original rear end and narrowed a 12 bolt rear end. It went better than it stopped.