Hey, I have a '91 Silverado K1500 and did the swap from tbi to tpi and love the results. I got a little better mpg and noticed a big difference in torque. I didn't buy that kit because I knew that I could do it a lot cheaper and get the same results. I got all my parts from a corvette at a junk yard, any tpi car will do. I got the tpi unit, the computer and wiring and all the accessory brackets. The install was pretty easy. But if I had it all over to do I would buy the painless wiring kit for the wiring. I spliced my trucks wiring to the corvette's wiring and it really wan't all that hard it just took a lot of time to get it looking really good and clean. If you have any questions feel free to ask and I will try and answer them. Hope this helps.