Ive got a 93 toy-p/u...I put a mod-ed Kieth Black 22re motor in it built by johns foreign engines..view the extras @ 22re.com..Along with it I put a Pace Setter header,high flow cat,and muffler on...Also from same site....My truck seems to be running a lil off...Any help.....Seems to be running rich???272 delta reground cam and header make a mapin issue????MAF sensor adjust???Im confused?????Any help out there?????