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after reading about the jmod and valve body mod ,i have a couple of question about modifying the valvebody,it says to get a 1999 valvebody, well i have one but its from a 2000 f150 with a 4.2 engine,will this valvebody work in a 97 mark?if not can i change the higher 2-3 capacity valvespring,lower capacity 3-4 valve spring and revised manual valve,from the 2000 valvebody into my existing valvebody?is there anything else i should change?thanks
 
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