Anyone running 400hp 5.3L?

[Nrphlly]

Ok sorry guys holidays have caught up with me. Lol

6.0 engine has been ordered. That’s the biggest they could get in a “NEW rebuilt” condition

 

[ls1frc]

What engine is it? I thought 6.0 in trucks was always an iron block.

 

[Tonny]

What engine is it? I thought 6.0 in trucks was always an iron block.

I believe the 6.0 is one out of the Vortec family introduced in 1997. 4.8, 5.3 or 6.0 liter engines. Bigger bore 5,3 Vortec.