I am in the market to change manifolds with a higher plemun. I was told the Edelbrock RPM GAP would be the one? I currently have a Weiand Stealth Intake Manifold with a 750 mighty demon mounted on top. Any suggestions?

If you're only testing why not try a 1 or 2" spacer ? Cheaper :D and see what happens.

Well, the RPM AIR GAP is preped and ready to be installed...So far, smooth...I hope I do not run into any problems when putting the distributor back in?
Thanks Doug.

Fwiw, here is how I look at this..

The old Holley 300-36, true high-rise dual-plane intake is about the tallest one there is of the conventional dual plane intakes.. I mention this b/c here is just about the tallest so-called, dual plane intake going;

Hi-Tech Torklink Intake
www.hi-techengine.com/images/racing_products.pdf

It is a midrange torque producing roundy-round motor intake!! And it probably won't fit under a stock hood at all!!

The E-brock's are newer, but have alotta hype with them good or bad, you decide??

The old Holley/Weiand Stealth dual plane has the largest insides so go from there!!

I'd go the Stealth!! And I have a brand new, in the box, 300-36 for my next junk301 type motor in my closet... Summit's price is right here............

pdq67

I had a Stealth on my old 350 and also ran it on my 427 and loved it. I tried a spacer and that helped, but I decided to go with a Team-G to get rid of some of my low end torque in favor of more upper end power. I still have allot more low end torque than I can plant on the street. The Stealth does see some upper rpm improvement on the dyno with 1/2"-1" spacers with the right cam. But if you already have the Air Gap have at'er. I personally don't think you will see more than minor hp improvement over the Stealth that is only really visible on the dyno. Just my $0.02.

I know Edelbrock has the magazines pushing the Air Gap,..but do a search on this site and others. Some like it,..while others don't believe it to be worth the extra cabbage (me included).

That's what I'm politely trying to say too.

But it's not my money..

pdq67

Excellent

http://www.merchinv.com/manifold/Image001.JPG

All I'm gonna say is you need to look real close at the old Holley, 300-36!!

Fwiw, it is a TRUE high-rise!

pdq67

And Weiand now has a new dual plane out to compete with the RPM/Air Gap.

I know Edelbrock touts it's quality and great gasket alignment. And I'm not trying to take anything away from that but, I run Fel-Pro 1205 intake gaskets with 2.09 in. x 1.28 in. port dim. and, my Team-G matched up perfectly. In fact it is so close that I didn't even gasket match it. The #4 runner opening was the only one that was even of a little and that was only 1/32" on one side of the port.:D I couldn't have asked for a better match, and my old Stealth was a great match to the Fel-Pro 1256. Although that did have a couple edges that hung in @ 1/16" but still. Now I'm not saying Edelbrock is bad I'm just saying I've been real impressed with Weiand.

The Manifold and total install is complete and it works. The only problem I ran into the vaccume line for the break boster is to high for the demon secondary float bowel. So, a 1" spacer...Well, look and see for yourself!
http://www.merchinv.com/manifold/IMG_0087.JPG