I have just bought a 95 LT1 and I'm going to put it in my 91 tpi. So far all I have done is pulled out the stock wiring harness and computer and sent it off to Howell Eng. The guys there said they could use my tpi harness and convert it to run the LT1.
I have the following Q?'s:
1. Will the motor drop in and bolt up?
2. Can I still use my beefed up T5?
3. Will the TPI radiator work on the LT1?

If anyone has info on the project to help me out please let me know something.

 

If you want it to drop in and bolt up you have to remove the a/c pump otherwise you have to mod the pass. mount to brace the pump and beat up the crossmember, you can bolt up a T5 as long as you have an 86 up flywheel the radiator will not work im quite sure and you should get a 4th gen one the water outlets are opposite, you will also need custom fuel, power steering, and a/c lines, look in the swap section there are probably five of us currently doing this swap.

 

hey, already done the swap.

-no, you will not need a new radiator, just reverse the hoses
-power steering; easiest thing to do is, under the car, there is a loop in the original tubing, cut it at this loop, leave the original fitting on the steering box, and get I think its called a Swedge-Loc fitting for the other end with some high pressure hose
-a/c; find a carquest catalog and they have a special fitting that bolts to the compressor with swivel 90* tubes coming out the back. to these cut and weld your original lines. you dont have to modify your pass. mount but you do have to cut and weld the crossmember.
-fuel, just figure something out (sorry!) we found these tapered fittings that we simply heated the '95 plastic fuel lines with a heat gun and pressed them onto the fitting, you have to cut it off now, but we left the original screw fitting right behind it

if you need me to clarrify anything, drop me a line and I'll see what I can do

------------------
-'92 RS with self-installed '95 LT1
-Heddman Headers
-TPIS throttle body airfoil
-MSD 6-AL Ignition
Kills
-'97 Mustang Cobra
-'98 V6 Camaro
-'89 5.0 ****stang
-'97 Sebring
-'96 ****stang Cobra

Losses
-'99 Mustang GT
-'96 Mustang Cobra
-'95 Z28 (good race)
-'96(?) Turbo Eclipse (d*mn good race, heavily modified)

 

Hey guys thanks for your help.
I was going to get Howell Eng. to do my wire harness for $1,120, but I didn't. He was going to covert the 95' LT1 to run speed density, thats not worth a #%@%. The 95' LT1 ran off of a mass air and the injectors fired in a seq. order. They were not speed density which was batch fire. I got in contact with this guy from LT1.com who specializes in the wiring of an LT1 and the LS1 and told him of the guys from Howell and he helped me out. LT1.com can rewire the stock LT1 harness to fit into my 91' and still keep all of the gauges in the can functional, like:
speedometer
tach
oil pressure
oil level
diognostic prong
temp. gauge

They would also delete all the wires that the 95' harness didn't need to work in the 91' and still keep the computer from running in any type of limp mode. The check engine light will be running properly and the wiring which is to be deleted would be completly deleted which the computer would not turn on the check engine light.

So basiclly everything will still work. There price was only $175 for the wiring.

They could do the programing of the computer but it would be like a hypertech programer. For the mods that I was doing they told me to get in contact with a guy by the name of Ed Wright from Fast Chips and he could do the programing of the computer.
The mods are:
Lunati 383 stroker kit
Comp cam Dur.@50 230/244 Lobe sep. 112 Lift .510/.549
AFR 195's
SLP headers
3' exhaust flowmaster
MSD coil MSD 6A
ported intake
52mm throttle body
30# injectors
3.73 gears
NX wet kit 150 shot

The price for the programing would be about $350.

Does anyone know anything about either one:
www.LT1.com
&
Ed Wright for Fast Chips
If so, let me know somthing.
THANKS. Leathal_Injection

 

Hey, I am in the same boat as you...I was told by FIS( http://www.fuelinjection.com )which does wiring harnesses also, and they reommended http://www.carputing.com/ for the computer reprogramming (which you do yourself with a laptop). I am still trying to check everything out before I order eveything, but within a month, I will get this project underway...
MM

 

175 FRICKIN DOLLARS??????? NOW I FIND OUT!!!!

My Dad and I spent literally 3 weeks atleast trying to combine the two harnesses in the car and now I find out I could have gotten it done for $175? THAT SUCKS!!!

------------------
-'92 RS with self-installed '95 LT1
-Heddman Headers
-TPIS throttle body airfoil
-MSD 6-AL Ignition
Kills
-'97 Mustang Cobra
-'98 V6 Camaro
-'89 5.0 ****stang
-'97 Sebring
-'96 ****stang Cobra

Losses
-'99 Mustang GT
-'96 Mustang Cobra
-'95 Z28 (good race)
-'96(?) Turbo Eclipse (d*mn good race, heavily modified)

 

Wait wait wait... I'm currently working on this swap. I converted to 4th gen dash and everything. I kept my third gen dash harness, but spliced into 4th gen stuff... Ok so heres my question. Should I use the harness that came with my LT1? Or is there one I can get that's not too expensive that will just plug straight into my 3rd gen harness? So i dont have to cut and modify the big connector on the firewall? My car was originally a TBI car...

 

Wait wait wait! This thread is almost 8 years old, we have a subforum for LT1 swap discussions, and a sticky that covers it.

And, there's always Mr.

 

holy crap your right LOL