We build each LT1 Long Block one at a time to be a direct bolt in for your car. All machine work and assembly is done in house and we can custom build to suit your performance needs.
Kjell Ivar Seipajervi, Norway 396ci/550hp LT1
Our 383/400hp LT1 Long Block is a great daily driven engine that gets decent fuel economy and is a blast to drive.
Go to We build this engine to be a direct bolt in for your LT1 car and recommend our LT1 Ported Intake, 58mm Throttle Body and a set of Long Tube Headers in order to make the 440hp.
This 383 LT1 makes 500 Tire Shredding Ponies and is still very street friendly believe it or not.
Great engine for making up to 750hp with a Super Charger or Turbo, just add 15 psi and you will be in the range of 700hp +.
You can now make LS1 Type Power with a LT1 using our 396ci Long Block. This engine works best with long tube headers and 3.73 gears or higher and has a radical idle.
