Just use the Edelbrock performer non air gap. Same intake you wont loose anything IMO.

 

The rpm airgap will fit with a drop base. I have a 66 with stock flat hood and run a 14×3.5 air cleaner with a drop base.

Brian

 

What they said. it's the default around here. The non-AG is not shorter than the AG AFAIK.

 

X2 they are same height.
I can even fit the air gap under my 64 oem hood with drop base air cleaner and 2.5" tall filter.
Here are the spec on edelbrocks intakes. Just click on the model you like to check.
Intake Manifolds - Chevy - Introduction - Edelbrock, LLC.

 

well,you got the two used choices wrong, steer clear of the "tarantula". one of those marketing things that never worked well. You can use a UltraSeal 5828 gasket to put rect intake on ovals if you so choose, or jsut buy a oval dual plane.

 

buy an oival port Perf RPM AG, ruin it. It's well known to be one of the best BB manifolds ever, been proven here time and time again. But hey, if you've got the time and money to re-invent the square wheel go ahead. knock yourself out. The RPM AGs will still be there when you get tired of it and just want your car to run good.

 

If you run a dual plane think about a bigger carburetor.

Sent from my SM-S320VL using Tapatalk

 

FWIW - On my 65 w/flat hood - I have a GenVI block w/ sq. port heads, sq. port AirGap, 850 Holley and 14" x 3" drop base air cleaner and it has about 3/4" clearance to the hood. And, a sq. port intake does work and work well on oval port heads - been there.

 

FS, it dont have to be an "air gap" either if you can rustle up a regular ol RPM, or even a decent -163 oem mani. ( same as the RPM internally it would seem).

As Jason said earlier, duals require a larger carb in effect, as the carb only "sees" half the engine. So if an 850 works perfectly on a dual, you could likely use a 800 on a single, for example. You will need all of 800 cfm on a dual plane with a 4.25" stroke at 6000 I 'd reckon , if not more depending on the engine's VE. ( motors dont have an exhaust, engines do, technically)

BTW, had an LT1 in a Nova as punk kid, tried the "torker" , tried the Holley street dominator and finally went back to the Z/28 oem which blew the others away. So there ya go. Junk. BBC/SBC no matter. What do all the hot street folks run here the 10 sec street cars, Torkers? Everyone uses an RPM or similar dual plane. Well NOT everyone, I m sure SOMEONE has a small DOMINATOR on a single plane Vick J. But you get what I;m saying. The best sorted out combos use what you should buy for yours. Period.

 

Weiand Stealth is also another nice choice for your needs.

 

shhhhhh, I'm looking for one now, as they easily paint orange and look oem! Or a C427.

 

He is wrong when he told you that you can't run an oval port intake on rectangular port heads. You absolutely can. Aftermarket intake anyway. I ran an oval port Victor jr on a set of aluminum 074 heads for several years.other intakes might be different but the Victor jr oval and the rectangle intakes look to be the same just one is cut out more. I eventually switched to a rectangular.

 

Rectangular port intake works just fine on oval port heads. They don't leak,lose power,etc.
It doesn't work for the arm chair "gearhead" experts with an opinion because they don't spin a wrench or drag race nor have any data on the swap.
They only have a "theory" as to why it shouldn't work.

 

I had an oval port on rectangular port heads. Idea was the car was heavy, didn't need rectangular heads, but I already had them, so I used the oval intake on the idea it would have more air velocity better low end. .

 

Got it....Sears and roebuck intake with one barrel carb and six plug wires and advance timing 20 degrees. OK...An air gap with drop plate and rather large filter is the answer. THANKS to everyone who helped me out!!

 

Sooner or later, you will figure it out, but at only 48 posts, your indoctrination program is far from over. Be prepared for topics to meander at will.

 

ANd dont let Todd confuse you, those 074s are pretty small rectangular ports , so the precise manifold, a VicJ is a bit bigger than most OVALS is nearly "roval", so that particular combo may work. Yet, ordinarily only the bass-ackwards rect port intake on oval heads is what we'd recommend. With a small rect port gasket like you;d use for 074s, UltraSeal 5828 size.