I've got a 65' inline six that I love to death but the one thing she won't have is horsepower... I want to keep her as my cruiser so I don't want to drop anything in or change anything big so I plan on getting another Mustang for my power and speed needs. In YOUR opinion which mustang from 67'-04' (not too big of a fan from 05-present) would be a good year to drop a big engine in and revamp for total badassery? (not a word) Anything is in play including but not limited to: GTs, 500s, 350s, Cobras, Mach 1s, KRs, and everything else. I wouldn't mind doing a restoration either if it's an older model or just in bad shape if it's newer. 40k budget not including purchase of car and a little bit over budget is fine. BTW it needs to be street legal as well. Any long specific suggestions like the entire build are fine as well because I'm just brainstorming now and any idea helps so don't be scared to write paragraphs! Thanks for the responses!