Get the 460, then do the 532ci stroker kit on it!!! Not cheap, but man, do the run!!! The 408 is a good motor, if weight is a consideration, I would go that way. The 460's are of course heavier, but even a mild 460 with a good cam packs a bunch of torque. One of my books sez that shipping weight on an aluminum head 351 Windsor is 545 lbs, and an aluminum head 460 is 640 lbs. Weights are for a long block on both. Hope this helps ya. Ford rates the 392 stroker Windsor at 430 HP, 450 FtLbs torque. The 514 stroker from Ford is rated at 625 HP, 600 FtLbs toruqe. Both are available at your local Ford dealer in crate or kit form.