400 mod

i'm just learning bout fords and getting told many things,,,,they say the 400 mod is a 351 with a 4oo crank,,,a few said big block some small block,,i'm not really a dumb ass but they got me lost,,, thanks guys

Ford has a block between SB and BB. The 351C, 390, and the 351m 400 have the same block.
Check out http://www.projectbronco.com/History/history_of_the_ford_351m.htm
it will tell you every thing you need to know

thanks ,,looks like i might learn something