hey a buddy and i looked at a old bronco and it is a factory deal but its not a 351 but a 352 y block im told.ive dealt with 289's 3022 460's and just one windsor motor in my time any info would be appreciated.it has a huge stamp on the front of the block saying 352 just below the cylinder head.it runs like a bat out of hell and cam pull a housedown but not sure what to look upfor specs valve train and etc etc