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3.8 to 4.2 question

844 Views 9 Replies 7 Participants Last post by  itschristorres8
alrite so heres wut im wanting to do ....i have a 97 v6 mustang it a 3.8 single port...and im wanting to put the 4.2 bottom end off of a 97 and up f 150.....and then im wanting to put the 99-04 3.8 split port heads and upper/lower intake on top of that...just to throw ppl for a loop they will never exspect the 4.2 bottom end hard would this be to do and how much of a gain would i get....i kno the 4.2 block bolts up but other then that im not 100% sure
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