You could always look for a 200-4r they went into a bunch of different vehicles. With the 3.73 rear you'll love having OD. Another member here by the name of dogshit had a big caddy motor in his 442 with 3.73s and was able to knock down 17mpg on the highway and still run at the strip. With a smaller motor like a 305 or 350 you could get over 20. Just a thought..