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piecesparts · 03-28-2006, 12:53 AM

If you are using a late model LT-1, remember that the fuel injection will work best with a fuel pump that is installed in the fuel tank, not on the frame. The v-8 should bolt in like any other motor, but the distributor is on the front and it is VERY sensitive to moisture, (Don't wash the motor with water). The exhaust is basically a standard GM design, so the headers should hook up. You will have to get an aftermarket wiring harness from either Street & Performance, Howell Engineering, Painless Wiring, or some other supplier, to make the install easier. Look at a good set of new electric fans, or scavenge from the salvage yard for a good set. There are many ways to operate the fans for cooling, I would look for as simple of a set up as possible. Try looking at Centech for a wiring harness and controller www.centechwire.com

I presently am working to put a 90 Vette Tuned Port motor in a 1991 Chevy pickup, which will give me another 100 Hp over the enemic TBI that I already have. I am going with the "Integrator" setup that S&P sells along with their wiring harness. I have put in a set of "SPAL" dual 11" fans along with their controller so that I can operate the fans seperately. I am going to have to install a new fuel pump and some tubing to change the hook up, but that will be simple. The LT-1 is basically a later model of the TPI that I am installing and there is little difference in the basic hookup. The ignition and the computers are the difference.
I believe that if you look at the S&P website they have some data and install discussions on the LT-1 and TPI installs for you to review.

03-28-2006, 12:53 AM	#6
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: Putting a LT1 in a 86 Sierra? If you are using a late model LT-1, remember that the fuel injection will work best with a fuel pump that is installed in the fuel tank, not on the frame. The v-8 should bolt in like any other motor, but the distributor is on the front and it is VERY sensitive to moisture, (Don't wash the motor with water). The exhaust is basically a standard GM design, so the headers should hook up. You will have to get an aftermarket wiring harness from either Street & Performance, Howell Engineering, Painless Wiring, or some other supplier, to make the install easier. Look at a good set of new electric fans, or scavenge from the salvage yard for a good set. There are many ways to operate the fans for cooling, I would look for as simple of a set up as possible. Try looking at Centech for a wiring harness and controller www.centechwire.com I presently am working to put a 90 Vette Tuned Port motor in a 1991 Chevy pickup, which will give me another 100 Hp over the enemic TBI that I already have. I am going with the "Integrator" setup that S&P sells along with their wiring harness. I have put in a set of "SPAL" dual 11" fans along with their controller so that I can operate the fans seperately. I am going to have to install a new fuel pump and some tubing to change the hook up, but that will be simple. The LT-1 is basically a later model of the TPI that I am installing and there is little difference in the basic hookup. The ignition and the computers are the difference. I believe that if you look at the S&P website they have some data and install discussions on the LT-1 and TPI installs for you to review. Last edited by piecesparts; 03-28-2006 at 12:55 AM.