[70rs/ss]

I think a flat top and Vortecs are OK as they are not a knock prone as the old school iron heads are. If you are going to rebuild the 350 (new rod bolts, resize the robs, recondition the crank, bore the block, deck it etc, etc) the cost of a cast 383 stroker kit really isn't that much more. They come with pistons, ring, gaskets, rods, crank, for like $900. Then all you need is your block prepped, a cam and a set of heads. I'd figure a good 350 build would only save $3-400 over a 383 build. By the time you condition a set of rods and a crank you are near $400, then you need to buy pistons as well, so you really only spend a few hundred more and get a lot more by way of torqu and you'll need it with big axles and tires. Just a thought.