LT1 94 3500 dually

[Frankselectronics]

we have recently pulled my tired 6.5l diesel out ,Locked up, and Installing a 95 lt1 5.7 small block out of a 95 Trans am , hopping somebody has done some leg work on this converstion , Any help sure would be aprectiated , I have harness and computer out of ta also , I am an electronics guy , do i need to build my own custom harness , both are obd1 i think , and I have complete gm schematics on both vehicles , but if convert gas peddle to cable for this 5.7 how do i make the 4l80e shift?

 

[Will L.]

Many start then abandon the process. The value of the truck drops and this is a costly process. If you do it -has to be because the truck has special meaning and you are fed up with diesels. Even at that not legal to do in some areas- check with your DMV before beginning.

Here is your transmission controller you use:

Leroy Diesel

leroydiesel.com

Pick your own stand alone engine controller is required for your set up.

Plan on custom made dashboard with dial gauge full set from summit of the like.

Make sure you understand the massive loss of torque so towing and being slow acceleration you will have. You will burn more fuel doing it as well, but half the time gas is now same price as diesel so might be ok.

Eliminate the 5/16 fuel return line to the tank. Bypass the lift pump. Fitting an in tank fuel pump for gas requires you to be ok at fabricating. You have 3/8” fuel line from tank to FFM now, some custom line work from there is easy. Depending on your system if you need the larger return line or none at all.

If you are not emotionally attached to the truck- you are usually money ahead to sell the diesel truck and start with a gas one.

The throttle pedal- depending if you are going mechanical- hot rod pedal kits.
Fly by wire, take it from the donor rig.

Get rid of the hydroboost, get the entire set up for the brakes from a junkyard to go to the vacuum system now. The torque load on the pump is ridiculous compared to the gasser using vacuum. This is an often overlooked issue.

All the diesel components you remove - sell for a couple bucks to help the cost.

Please take pics as you go, we can walk you through it but seriously do the $$math first. Then you will understand why most people don’t swap between gas & diesel.

 

[MrMarty51]

Welcome to TTS Frank.
If Your 6.5 engine has the alternator bracket on the right, passenger, side of the engine, I would buy the bolts that goes through the alternator bracket, through the coolant pump and into the block.
Far as that goes I could buy all the bolts that goes through the water pump.

 

[Frankselectronics]

Many start then abandon the process. The value of the truck drops and this is a costly process. If you do it -has to be because the truck has special meaning and you are fed up with diesels. Even at that not legal to do in some areas- check with your DMV before beginning.

Here is your transmission controller you use:

Leroy Diesel

leroydiesel.com

Pick your own stand alone engine controller is required for your set up.

Plan on custom made dashboard with dial gauge full set from summit of the like.

Make sure you understand the massive loss of torque so towing and being slow acceleration you will have. You will burn more fuel doing it as well, but half the time gas is now same price as diesel so might be ok.

Eliminate the 5/16 fuel return line to the tank. Bypass the lift pump. Fitting an in tank fuel pump for gas requires you to be ok at fabricating. You have 3/8” fuel line from tank to FFM now, some custom line work from there is easy. Depending on your system if you need the larger return line or none at all.

If you are not emotionally attached to the truck- you are usually money ahead to sell the diesel truck and start with a gas one.

The throttle pedal- depending if you are going mechanical- hot rod pedal kits.
Fly by wire, take it from the donor rig.

Get rid of the hydroboost, get the entire set up for the brakes from a junkyard to go to the vacuum system now. The torque load on the pump is ridiculous compared to the gasser using vacuum. This is an often overlooked issue.

All the diesel components you remove - sell for a couple bucks to help the cost.

Please take pics as you go, we can walk you through it but seriously do the $$math first. Then you will understand why most people don’t swap between gas & diesel.

thank you so much for the info , yes definantly know this project will cost , this truck has been in the family for a long time

 

[Twisted Steel Performance]

Welcome to TTS Frank.
If Your 6.5 engine has the alternator bracket on the right, passenger, side of the engine, I would buy the bolts that goes through the alternator bracket, through the coolant pump and into the block.
Far as that goes I could buy all the bolts that goes through the water pump.

Unique diesel has all the fasteners...

 

[MrMarty51]

Unique diesel has all the fasteners...

I’ll check there.

 

[MrMarty51]

Unique diesel has all the fasteners...

Thank You very much Chris.
The two longest bolts is on the way.
I tried to order two of one and one if another if the bolts and could get only one of the one I wanted two of and none of the other so I just got the two longest ones.
It gave no dimensions but said long long so I hope its the proper units.
If not, then I’ll have some studded metric bolts to put into the green folgers coffee container.
YUP, the rest if the containers is red, metric bolts and nuts is green, with a gold colored top.