Not much will bolt up except other early olds motors,you can use 57 to 64 motors but you would have to find a flywheel for the 57 to 64 motor as they are externally balanced and the 49 to 56 motors were internally balanced. Is your motor tired? I have a 56 motor on the stand I was building for a 53 88 that I have since sold and it only needs a cam gear and oil pump to complete,if interested I will give you the details on what was done to it and I am only down the highway a little from you. Jeff