If you want to do head work or put a bigger cam in you will have to do a mass air conversion. I want to do a mass air conversion on my truck but it will take a lot rewiring that makes my head spin just thinking about it. the best way to do a mass air conversion is to get a wiring harness and ecu from a 5.0 mustang, then you will have to custom tune it.
Iv'e been told that some of the mass air kits on the market are junk so beware of them.
Don't waste your money on a chip, I bought a JET chip for my truck, it didn't do anything really noticeable.
Troyer performance makes a underdrive pulley set for the EFI 460's. I have read in several places that guys have picked up 15 dyno proven horsepower with them. these will be the next thing i buy for my truck.
Last edited by 97puller; 07-28-2010 at 12:50 PM.