Lucky Me, Now What

Have you "dropped" this 440 crank in the 383 yet? You know the mains are different and the throws will hit the block I assume. Getting past these minor setbacks, you could do a 400 better than a 383 with the same amount of funds. More cubes and I believe a better selection of shelf stroker pistons. The B fits better than the RB in these chassis, slightly more narrow and the extra 1/2 inch on each side or so may be all you need for a hassle free install.