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i was wondering what the best header intake combo is for a 91 300 EFI. also can you swap out the air box with one from a 302, it sit higher than the stock 300 and i keep getting water in there wheeling. also, can you turbo it with a disel turbo...sounds interesting...what mods do you recomend for some quick, cheap hp.
1991 4x4 F150 Ex. Cab 300 CID 5 spd.
runnin' on 35 and a three " lift
the stock manifolds flow pretty well on the efi motor, but headers are a step up, just about any long-tube you can find will work well, personally id go for the headmans at summit.
nobody makes an efi intake, at least not yet, that may change in the near future. if you really wanted to you could switch over to a carb setup with a 4bbl, but whether thats worth it or not i dont know. you can always fab up a cai, but the stock pre-tb induction system isnt the restriction in a 300.
turbo mods are possible, theres a couple peeps around here with them, and they can help you more on that end.