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Old 03-18-2012, 06:32 PM
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New BBC need carb/intake advice

I just got a great deal on a 454 bored .30 over and need to know what carb and intake to get for it she's going in a 1971 c10 weekend cruiser it will be bolted to a built th350..Here's what I know about the engine...

1981 454 bored .30 over
hypereutectic flat-top pistons w/ stock rods
stock bottom end
stock oval port heads
Lunati 543 lift 290 duration hyd. flat tappet cam

Engine is freshly machined with new cam bearings and heads gone through need carb and intake suggestions/advice...Thanks

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Old 03-18-2012, 06:51 PM
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which oval port heads are they? (casting number) can be found under valve cover on head

if they are peanut ports, there is only one intake that I know of here it is , that and a good quadrajet carb (here is an example) would be good choices


if its not peanut ports and they are standard oval port heads, I would use an edelbrock rpm intake and a 750 holley type carb

but i'm no expert
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Old 03-19-2012, 05:37 AM
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Quote:
Originally Posted by matts37chev
which oval port heads are they? (casting number) can be found under valve cover on head

if they are peanut ports, there is only one intake that I know of here it is , that and a good quadrajet carb (here is an example) would be good choices


if its not peanut ports and they are standard oval port heads, I would use an edelbrock rpm intake and a 750 holley type carb

but i'm no expert
matts37chev, your advice is spot-on IMHO. The aluminum PP intake would be my choice by far. The cast iron PP intake for the Q-jet is an OK piece if the cam is mild, but it is heavy and has an EGR port that will need to be blocked off most likely. Don't be tempted to use an adaptor on it to run a squarebore carb, though.

Many say the port mismatch using a standard oval port intake on PP heads doesn't hurt- some say it even helps- but I'm of the mind that I want the ports to match.
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Old 03-19-2012, 06:05 AM
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Would the Holley PART #: 0-80508S work I want it to have an electric choke or should I look at something else

Last edited by bigj7698; 03-19-2012 at 06:28 AM.
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