Need some advice

Welcome. Hard to put a price on it w/o seeing it. As 1968FormulaS340 & mischiefdart noted, lots of variables. My Duster was a similar type of find, i.e. 340 4spd, but converted to a 727 at some point, needed lots of wiring work, bad steering gearbox and leaking oilpan among other things, but ran and turned out to be solid. The seller was very cool and let me really dig into before making an offer. A magnet would help you find filler on the body. Crawl under that sucker as really get a good look at the frame, esp spring mounts etc. Pull up the trunk mat and if possible carpet in the front to eye the floor for rust etc. I also brought a second set of un-biased eyes to look it over to keep me focused (I really liked the car but did not want to make an "emotional" decision).

Good Luck and post up how it turns out,
Pat