...please exsplain? ok i found a 4.3l tbi motor but it doese not come with the computer i know ill have to buy the computer its 50 bucks but can i use my wire harnes off the 2.8 tbi. exsplain please thank you. my s10 is a 1991 and the 4.3 tbi im getting is a 1990 im planing on doing the swap so please tell me everything you know about doing this swap.