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I took off the cats. and put on shorty headers and a bassani y pipe but truck seems to run alot richer now. Iwould also like to know what would be a timing degree to set truck at I have also put in a heat range hoter plug.since taking the cats off my gas milage has also drop.Its a 1995 f150 4x4 with a 302 and 4r70 w trans with 355 axle ratio. any help would be greatly appreciated.