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purchased a 1996 f250 with 460 cin and 410 rear end have recently changed rear end to 355. i was getting 13 1/2 mpg up from 10 , but now it has dropped back to11 mpg. living in florida now so every thing flat . i did live in pa when i got 13 1/2 mpg, any one got any ideas on what is going on
tks john
hi to every one new to site
You will need to post question in the tech forums since this one is only used for introductions. There are several that you could post in, try this one: Big Block V8
Take your time looking over the forums, there is a lot of information in them.