hello i have two vehicles that use tbi and would like to learn how to tune their computers from reading up in this forum. i have an 88 k5 blazer (obviously) and a 92 1500 single cab step side. both have 350's and 700r4's. my blazer has an RV cam, flat top pistons, headers, 1.6 roller rockers and a 6 in lift on 33's with 4.56 gears and a posi in the back but the best part is its sweet new blue and white paintjob. my 92 is all stock but i just ordered exhaust for it so its a start.