OK here's a lesson on fords ,they built motor's in familys ,for example 289/302 are one family.the 351's i'm sure about,but the 352/360/390/428 are referred to as the FE family and will only interchange with eachother ,the same go's for370/429/460.the only exception to this is you can put 351windsor heads on a302but you have to sleeve the head bolts.( there may be others that I'm not aware of but most of the time you have to stay in the engine family)