I put a 292/Turbo 350 in my 54 Bel-Air. I don't know if the 250 is shorter than a 292 but there's not enough room for your fan blade to go on. I only have about a 1/4" space between the water pump pulley and the radiator. I just use an electric fan. But, I'm also using the original radiator. I'm sure someone probably makes one that's thinner that could be installed. I just didn't want to go hacking the radiator support to get one in. I'll probably have to get a different radiator before summer though because the old copper one just doesn't cool that well. It runs about 195 all the time except when going up a long hill and then it will run about 210 or better. That's just too hot. If you install the 250 and use your stock radiator and it doesn't run hot, let me know, I may have something else wrong with mine besides the radiator.
