C30-350 cam & manifold for torque/mileage?
Got tired of 8-10 MPG out of the "Good-wrench" 350 in my '81 C30 one-ton dually flat-bed.
It's my support truck, hauls the smaller cars and all the junk, does my towing, NOT a speed-performance vehicle.
Seems to me it used to get better mileage but lately it's been pretty bad, around 10 MPG.
I have to replace the flywheel ring gear, and a fender.
So now seems like a good time to upgrade the engine with a new timing chain, improved cam, lifters, and intake.
It's got an almost new Q-Jet on it and it seems everyone insist they are great so I should keep it.
My prior flat-bed Chevy had a "Stock" crate engine, with a Performer cam and manifold added.
It got much better mileage, but I do not remember what carb it had.
Back then I was also running at much lower elevation, and it was all thirty years ago.
So what would be the suggested "Best" cam and manifold for this truck?
Currently it struggles to get over the Sierra's and as said mileage is not great even on level ground.
And no, not intere$ted in an F.I. conversion.
Performer idle to 5000 cam still the best, or has technology improved for flat-tappet 350 truck engines too?
I bought a new Perform RPM Q-Jet intake at a good price but it seems that is the wrong manifold to use. (1500-6500 RPM)
Regular Performer still good, or has real progress been made in the past thirty years?
Like I said, not looking for a lot of "performance", but I do want to be able to cruise with traffic.
So that means 75 or so with 4.27 gears, no OD, 16" truck tires.
I know someone is going to say I'm trying to have my cake and eat it too.
But I've done this in the past so it should still be possible, and easier with all the new tech "Improvements".
At these gas prices I want it 100+ octane, leaded, and my windshield washed!