350 chevies are easy to find. Pick up a swap sheet, go to a junkyard ect. Personally, i would get a 350 pontiac. A bit harder to find, but a lot more of a bolt in .since you had a 350, most of the hardware is already in place. Just be sure to complete all major repairs before putting it in. Headers/cranks/flexplates/rear mains are all a lot easier when it is in the air.