new L31 crate motor to replace 87 5.7 tbi - The 1947 - Present Chevrolet & GMC Truck Message Board Network

01-10-2016, 04:55 PM

#15

MikeB

Senior Member

Join Date: Jul 2000

Location: North Texas

Posts: 4,038

Re: new L31 crate motor to replace 87 5.7 tbi

Quote:

Originally Posted by rfmaster

For the record, the absolutely the worst thing you can do for L31 in originally equipped LO5 is to install a carb. Leave carburetors in 20th century where they belong. Enough said.

That's well and good if you have the complete intake system, fuel tank with integral pump, computer, wiring harness, head pipes with dual cats, and electronically controlled trans. Unfortunately most guys with 73-87 trucks do not have those 96-up parts.

Also, I can fine tune my Holley and HEI to the nth degree while spending next to nothing.

__________________
Mike
1969 Custom/10 LWB -- owned for 37 years. 350/TH350, 3.08 posi, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. Hedman stainless headers. Old Air installation in progress.
1982 Custom Deluxe 10 SWB -- converted from 250-six to roller cam 350 w/ Vortec heads -- sold
1981 C10 Silverado LWB, 305, TH350C -- sold, but wish I still had it!
1969 C10 (not the current one) which I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 26 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

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