Put a 3.750 stroke crank in it.Getting Ready to rebuild my 383 too...Using the 440 Source Heads. Heads may need some work to get me to the desired 10:1.....440 Source rods, Pistons yet to be determined, Schneider 140H Stick (280/480) and Weiand 8088. Going to let Machine shop guide me on final but headed that way next. Will update as the build progresses. Just wanting a strong street motor with a little fun backed by 2800 Stall and 3.55 gears.