Just bought a low mile 4.8 engine & transmission for my daily driver 2wd crew cab S10. Mileage is my primary concern as I drive 100 per day to & from work. Texas Speed said use a stock cam. Was wondering if a pullout cam from another engine could get the same mileage & more power. Anybody have any experience in this area? Any help appreciated as this is my first LS build. Thanks

 

Ls6 cam would be a good small upgrade, won't give much power but it will give a little, nothing like a aftermarket cam though.

 

Go over to performanstrucks.net and do a search alot more info for truck motors.

 

Any cam that will add noticeable power will lower your mileage. Can't have the best of both worlds lol. I'd just leave it stock

 

Just gonna leave it stock & put a tune on it. Thanks

 

IMO, a small cam shouldn't hurt the fuel economy with a good tune.
Put a Howards #190315-14 cam in it (210/214 114lsa+4, lift is .595"/ .598", or just about any of the 212/218 cams available in the 112-114 lsa range would also work good!
FYI, Gear size will be a factor in fuel mileage.

If you decide against a cam then at least put a good flowing exhaust on it, and make sure you're also getting the coolest possible air into the intake.

 

You could put ported heads, high-flow exhaust, and intake, and you'd gain power and MPG.

Get ported 5.3L heads, 1-3/4" headers, HF cats, and a CAI. You'd be looking at maybe 2k in parts. Swap the LS6 cam while you're at it. It'll gain you MPG and probably a solid 50HP with a tune.