The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

**truckster** · 02-13-2019, 05:02 PM

From an economical standpoint I think the L31 makes more sense. Replace the cam with the HT 383 cam and you'll be right around 330 HP and 400 ft-lbs torque. You'll pay a lot more for the ZZ4 with not a lot of gain. The ZZ4 is designed for high-RPM performance, while the L31 is designed for grunt at the low end, where your truck needs it most.

02-13-2019, 05:02 PM	#3
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,844	Re: L31R complete or ZZ4 short block From an economical standpoint I think the L31 makes more sense. Replace the cam with the HT 383 cam and you'll be right around 330 HP and 400 ft-lbs torque. You'll pay a lot more for the ZZ4 with not a lot of gain. The ZZ4 is designed for high-RPM performance, while the L31 is designed for grunt at the low end, where your truck needs it most. __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson