I have a 65 originally with a straight six. This is the original axle from the car, and if possible I would like to salvage it for cost purposes. I plan on going with a 289 or 302, and my problem is I cannot identify what size the differential is. I know from the decoders that the ring gear is 7.25" and the shaft splines are 24. I need to get some rebuild parts for this axle and cant find anything. Help!!