FYI, with a LOT of first hand poly experiences, you're gonna have a time stuffing it in, especially around the steer shaft. it is actually wider than a 383 or a 440. And weighs nearly as much. You'll need bigger torsion bars. Also, if you have power steering and want to keep in, forget it with the poly in the early darts. I have an early B body with factory power steering and there's barely an 1/8th between the head and the power steering box.
