Upgraded to 357 and need help!

[Fordeatinz71]

the number is just like you looked it up.  you have a Gen 1 small block.  what heads are you running?  i mean, are they newer centerbolt style or older perimeter-bolt heads?  that's what determines what intake you can run.  the casting number on the block doesn't really mean squat.  it's about what heads you are running, as that's what the intake bolts to.  honestly, you can make an '87-up intake bolt onto '86-lower heads you just have to elongate your bolt holes.  anyhow, to answer your question, if you have the perimeter bolt heads you want to go with a '86-down intake...if you have the centerbolt heads, then go with the '87-up style. 

oh, and in case you don't know what i mean by "perimeter-bolt" and "center-bolt" i'm referring to the way the valve covers are attached to the heads...

[83HighSierra]

i have centerbolt closed chamber heads

[VileZambonie]

Your truck is gonna loaf around with a single plain intake. Why do you want that intake?

[Fordeatinz71]

i totally missed that Vile.  yea, you WANT a dual-plane...trust Vile if not me...he's forgotten more than most of us will ever know about this stuff

[83HighSierra]

I was wondering about the victor because thats what a buddy of mine mentioned i should get. What intake and carb combo should i get then?

[Fordeatinz71]

honestly, since you don't know a whole lot about this, i strongly recommend an Edelbrock Performer package, sans the cam.  get their matched intake/carb combo.  just match it to what comes closest to what you have.  personally, i think a good DP intake and an Edelbrock 600 like Vile mentioned would be great on this combo.  Weiand makes a good intake too...a good DP intake from most places will work nicely...then don't put anything over a 650 cfm carb on it...heck, 650 is probably too big...a 600 should be perfect

[TexasRed]

I was wondering about the victor because thats what a buddy of mine mentioned i should get. What intake and carb combo should i get then?

What stuff do you have now in your engine compartment? Since its an 1983 it does not have to run through the sniffer but it's supposed to have all the emissions equipment it had on it from the factory. Do you have a charcoal canister? If so, I'd run a Edelbrock Model 1400 which is emissions compliant for 1980 and before. Don't worry, it'll work on yours. It's also an electric choke, so if you have only a manual choke, you will have to run a B+ wire to it (the ground wire just connects to a screw on the airhorn).

If you have problems, I'm in Houston as well. Not that I know anything, but sometimes it helps to have someone else look into the engine compartment and say, "Ah-yep, it's a GMC."

[86 chevy silverado]

I would run a decent dual plane intake with that cam. Just plop an edelbrock 600 on there.

Listen to Vile! Victor jr is for a higher RPM motor. You want something that is going to produce good low/ midrange torque/ horsepower. The victors power range starts around 3500 RPM, way to high for a truck, it will be useless (it will only look cool). Look at the RPM air gap or similar, great performance 1500-6500 RPM. You'll be much happier.

[83HighSierra]

ok so i think im going to go with what vile said because you obviously know what your talking about. So if i get a decent dual plane intake and a 600 or 650 cfm carb will i still get alot of power out of the engine as i can for a decent daily driver or weekend truck?

[VileZambonie]

Go with the Edelbrock performer RPM or a similar manifold.  I made a post a while back showing what the main difference between a dual plane and single plane manifold is. You can search for it... Anyway a heavy truck that's driven on the street will have always respond better with a dual plane. Ideally variable intake geometry would be the best but no one makes one for these engines that would be practical. So again dual plane is what you want