The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What GM create engine to buy for 3/4 ton 72 C20

6T7 C10 · 11-12-2017, 09:28 PM

I am about a month away from firing up my L31-R GM long block crate engine. It has been fun doing it and I would do it again. You will need an electric fuel pump as it is not drilled for a mechanical pump. I went this route for its simplicity, historical reference and bolt in ability versus a LS swap (nothing against LS swaps as that is on my bucket list). I gathered a HEI ignition, low profile dual plane manifold, small four barrel carb, serpentine belt system and ram's horn exhaust manifolds. Just for fun I put in .015" Fel-Pro head gaskets, 1.52:1 full roller rockers and painted the entire engine Chevy orange.

I think it would be a good choice for your C20 as that is what was in C20's in the 90's and the best GM had to offer in mass for the small block. Any mods and torque converter stall should be done with low end torque in mind.

11-12-2017, 09:28 PM	#8
6T7 C10 Registered User Join Date: Feb 2015 Location: TX Hill Country Posts: 150	Re: What GM create engine to buy for 3/4 ton 72 C20 I am about a month away from firing up my L31-R GM long block crate engine. It has been fun doing it and I would do it again. You will need an electric fuel pump as it is not drilled for a mechanical pump. I went this route for its simplicity, historical reference and bolt in ability versus a LS swap (nothing against LS swaps as that is on my bucket list). I gathered a HEI ignition, low profile dual plane manifold, small four barrel carb, serpentine belt system and ram's horn exhaust manifolds. Just for fun I put in .015" Fel-Pro head gaskets, 1.52:1 full roller rockers and painted the entire engine Chevy orange. I think it would be a good choice for your C20 as that is what was in C20's in the 90's and the best GM had to offer in mass for the small block. Any mods and torque converter stall should be done with low end torque in mind.