1979 Trans Am LS engine T56 transmission LY6 LS3

  • Make: Pontiac
  • Model: Trans Am
  • SubModel: Trans AM
  • Type: Coupe
  • Trim: 2 door coupe
  • Year: 1979
  • Mileage: 75,000
  • VIN: 2W87Z9L161156
  • Color: Red
  • Engine size: LS 6.0L V8
  • Number of cylinders: 8
  • Transmission: Manual
  • Drive type: RWD
  • Interior color: Black
  • Vehicle Title: Clear
  • Interested? Contact seller!

1979 Pontiac Trans Am Trans AM Description

Well, as my family grows it is time to sell my Trans Am. At this point, I just rarely drive it. I have had this for 4 years and the build has been a slow and thorough one. Using some of the best parts.

1979 Trans Am factory equipped with air conditioning, 4 wheel disc brakes, and power windows.

I will try to be as detailed a possible overall.

I purchased the vehicle with a Pontiac 400 that had spun a rod bearing. It had a 200R4 in it as well. We pulled both the motor and transmission and decided to go the LS swap route.

The build was completed by R&P Machine Shop.


I purchased a 6.0L engine. LY6 engine(came out of a 2008 Chevy Silverado 2500 HD) that had 65k miles on it from a local salvage yard. From that point I took the engine to XP Racing to have it gone through. Engine was gone through and looked great.

At that point, I decided to upgrade the cam. So more was upgraded. Here is what was added during the time at XP:

*LS3 Monster camshaft

LIFT- Intake .598, Exhaust .612

DURATION- Intake 235, Exhaust 244

*Texas Speed & Performance .650" Lift Valve Spring Kit

*Texas Speed & Performance 7.400" Chromoly Pushrods

*Texas Speed & Performance VVT Delete kit

*GM Old Style Valve Guide Seal Kit

*GEN IV Timing Chain Dampener

*LS7 Lifter Set

*GM 6.0/6.2L Cylinder head Gasket

*Melling High Pressure Oil Pump

*GEN IV Cylinder Head Bolts

More engine parts:

New GM Water Pump

New GM Alternator

New GM Starter

New GM Pilot Bearing

New GM Throw out bearing

All new F Body pulleys

LS3 Intake from a friend on a local forum

Edelbrock Throttle Body from same friend on local forum

New IAC Motor @ Throttle Body Superstore

New Oil Pan, etc. from Brewers Restoration

Cooling Fans from local forum

ECM from local forum


New Battery

New spark plugs and wires

New MAP sensor

New radiator

New throttle cable

New accessory belt


I purchased a 60k mile T56 from a friend on a local forum as well as a driveshaft(which I later had modified).

Transmission cross member from Brewers Restoration

Drive shaft modification and new u joints were completed by Inland Truck Parts


Wiring harness was specially built by BP Automotive for the swap


GM201FI fuel tank and pump combo

GM Corvette fuel filter/ regulator


Hooker Headers(2472-1) were purchased from Jegs

Hooker Maxflow Mufflers from Summit

Summit Racing X Pipe

Exhaust tips from Summit


New floor pan from Summit

Refurbished steering wheel

New black carpet from Classic Industries

New door panels from Classic Industries

New seat covers from 78TA.com

New door handles from Classic Industries

New driver and passenger door glass and door felts from Classic Industries

New coat hooks and dash bezel from Classic Industries

New dash cap from F Body Warehouse

All gauges were purchased from Speedhut

GT Mat from GT MAT

New GM hood release cable from Kendall GM

New weather strip seals


New headlights

New headlight adjusters

New Trans Am Decal set

Factory honeycomb wheels refurbished 'snowflake' style 15"

New Nitto Drag Radials

New front tires 225/60/15


Car came factory with 4 wheel disc brakes

New Iroc Z steering gear and hoses

New brake master cylinder

New slave cylinder

New Rockford Fosgate Dual 3.5" speakers were installed where the single factory speaker used to be under the dash

New Rockford Fosgate Prime R169 6x9 speakers in rear

New Kenwood KDC-HD262U Radio


This car was dyno tuned after the build and it made 407RWHP.

I also have a walk around video of the car if requested.

Air conditioning is not currently working. Factory air conditioning ducts are still in the car, but vehicle will come with a compressor, dryer, and condenser from a 2002 F Body as I was going to install that over the winter.

I took a lot of pride in getting this car where it is today. Very careful planning and choosing installers that had the best reputations.

Paint is nice. Not perfect, but really nice.

I have over over 33k total invested in this car. I have folders full of receipts that will come with the car.

Feel free to call or text me with any questions. 4052058095.

On Oct-03-16 at 10:17:04 PDT, seller added the following information:

I felt the need to clarify further, but the AC/heater/blower does not work.I haven't had the time to troubleshoot. This was also a winter project for me.