I have a 1968 250 in my '37. I had to make different mounts. Does your transmission mount like a normal new car with one rubber tail shaft mount? If not, you may have trouble mating the engine to it. I used a late model automatic so it was pretty easy to change over. Also, the 250 is a longer engine and I had to set the firewall back a few inches for everything to clear and have some air space around it. The fan on the 250 will set lower, I had to lower the radiator to get full air flow from the fan. The radiator must be in good condition or you may have heat problems. I took the top tank off my and really cleaned it out, Still ended up with a new core. I think the 250 runs a little hot and doesn't hold much water in it. It takes a good radiator to control it. Is your temp gauge a manual type, with the copper tube and bulb on the end. The sending unit mount on the 250 is clear at the front of the head, will your tube reach it? My didn't, $75 later I now have a new gauge that works. How is your exhaust, it will take larger pipe if you want it to run good. Have I scared you yet? Joe
