The cost should between the 2 should be close. Advantage with a V8 is that parts are easier to get than the 2F. Advantage with the 2F, if it's done right, it will last a good 200k depending on driving style, and it's original, which will keep it's value if you ever decide to sell.I'm waiting on a quote to come back on a 2F rebuild. I'd keep the stock 4 speed right now and hopefully scoop up a used bell housing here on MUD. Either way, the tear down begins tonight IF the V8 conversion is cost prohibitive compared to rebuilding the 2F, then I'll go 2F.