There are not too many cheap trans options for those motors,the 64 had a slim jim which I heard can be a problem or a 59 or 60 jetaway would fit that motor. Stick setups are rare for those motors,I have a setup from a 53 that would bolt on a 57-64 motor but would require a differenft flywheel as the 49-56 motors are internally balanced and the 57-64s are externally balanced. There are a couple of companies that will modify a late trans case to bolt to the early olds motors but they charge around 900 dollars to modify and that does not include rebuilding the trans,you would be better to use the ford motor as parts are easily found. I have had many 51 to 59 olds and they are good motors but you cant bolt on later trans to them and if you are going to use the 64 olds motor I would suggest finding a 59 or 60 trans and flexplate which some a couple of junkyard around here have. Jeff