The external parts of a small block are all the same! Your 383 as far as the pulleys are concerned are the same as 1955 265. I'm running a short water pump with a 350? All you need are the brackets from a pre-67 Vette or most small blocks from that era. You could try March Pulleys... They have killer billet alum brackets, but you better hang on to your wallet. You could also search Classic Industries website. The only time you can't run a short pump is with the new plastic timing cover? Or at least I thought so. I'm sure other have opinions about this too.