I have been thinking about building a reliable street engine for a heavy car, running A/C, power steering and brakes, throttle body fuel injection, and some form of O/D transmission. I used to run a 400 with a 222/234 cam, pocket ported heads (250 cfm), dual plane intake, 1 3/4 headers. It made 415 HP and 450 TQ, and was a nice street motor. If you put a 4 inch stroker crank in a 318 magnum you are right about 383 cubes. I am wondering about how the right combo would compare with the big block 383. I am thinking EQ heads or Eddies, but no idea on cam choice. The beauty of the magnum is factory roller lifters and the ability to use a factory O/D transmission. For the purposes of the discussion, I want it to be a 383, so don't say why not use a 360 block for more cubes..