bbc setup questions

[1971ls1longbed]

Hey guys I have a few questions I need answered about some things. I'll give you the engine setup so far and hopefully someone can point me in the right direction.

454 block bored.030
Forged bottom end stock stroke
Keith Black 257 pistons
Cloyes timing set
990 rectangle port heads w/ 2.30 intake 1.88 exhaust with heavy porting
Comp solid roller lifters
Comp xr280r cam 242/248 @ 050 646/653 lift on 1.7 rocker power band is 2500 to 6500
comp magnum roller rockers
Compression is about 10.3:1
Rear gears are 3.73
Trans is a custom built 700r4
Stall is 2800

My first question is about headers. Should i use long tubes or shorties? Someone told me that shorties would help with low end torque.
Second question is what intake should I use? I was looking at an Edlebrock Air gap performer rpm dual plane.


Hopefully someone has some answers for me.
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[redsled87]

I would use long tube headers. I think that intake would work for you.

[1971ls1longbed]

Im just asking because someone told me that shorties would help build better low end torque
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[TheCustomFactory]

They are backwards!! Longtubes help torque. Performer RPM airgap all the way. Very good choice for street engines. I would have to say the solid lifter cam is a bit much for the street but hey go big, why not?

[1971ls1longbed]

Anyone have a good recommendation on a carb?
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[TheCustomFactory]

Holley street avenger 770 or 880cfm. Should help with the street manners.

[redsled87]

Atleast an 850 or maybe even a 950. It is a BIG BLOCK.

[Blue Rat]

Sound like a good job for an 800 DP in the HP series to me. You could go 850 but it would be nice to try both. Depends on the weight of the vehicle. With that gearing think an 800 would be fine.

[1971ls1longbed]

Originally Posted by Blue Rat

Sound like a good job for an 800 DP in the HP series to me. You could go 850 but it would be nice to try both. Depends on the weight of the vehicle. With that gearing think an 800 would be fine.

Im using 3.73 gears

My next question is should i use a mechanical fuel pump or an electric
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[Blue Rat]

Either pump would feed it good.

[1971ls1longbed]

Ok i guess my dilemma is would one benefit me better than the other
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[Blue Rat]

Originally Posted by 1971ls1longbed

Ok i guess my dilemma is would one benefit me better than the other
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I think with everything in your setup. I would have to go with an electric pump. You can take the fuel pump rod out then an block it off.