I am building two 468 motors for my 33 fountain. Comp. is a shade under 10:1. I am running a crane cch296 hyd/flat cam (.551/.573), GM990 rec port heads, Imco powerflo exh, and AED/Holley 850 carbs.

What intake should I be looking for/why? My head aches with all of the choices out there. Some say dual plane, others say single.

Thanks in advance- Bryan

what rpm range do you want to run in????Dual plane works good under 5300 single over ....my.02

I have read some good things about the air gap manifold great torque

I ran edelbrock victors on my 540's na's no trouble here.

I am also contemplating this decision. I have been running Weiand Stealths (dual plane) and happy with their performance, but my boats former life as a saltwaterboat destroyed them and need to be replaced.
Under the direction of JimV I am sticking with a dual plane for my 454's (468's). I am running 5200-5400rpm max. I am just curious about the RPM air gap, it appears it has the cut out plenum as the Stealth but also new technology of the air gap. also $10 cheaper. any extra info on head to head performance would be great.

Rookie DanB ran them on his warlock drop him a PM...hey your from my neck of the woods post a pic of your boat so I know who you are!!!

I would run dual planes due to the 850s. Dual planes can tolerate a little more carb than single plane. 850s are on the big side for 468s, but not too bad if used with dual plane.

BT

You want the airgap. Your CID and the expected RPM range of a Bravo drive you don't need the runner volume of the single plane stuff. The air gap is a good choice between a dual plane. .. you get that low end torque from the runner design. . .and the single. . .since the runners are isolated from the valley pan area the intake charge is cooler and makes more power. I would run a 1" 4 hole spacer with this also.

Chris
Stef's Performance

I have run the Performer and Air Gap back to back and saw no differance in performance. One did hurt the wallet more and required modifications to the 40 dollar inlet hose. I then ran a Edelbrock Torqer which made a big differance eliminated bow rise and took it up to the limiter with out having to wait for the boat to "air out". I also ran both an 830 and a 750 on each combo there was little if any differance there.
I port heads for as side line for a friends shop and have flowed a few single and dual planes and ported a few my feeling now is dual planes suck and I will most likely never purchase another.

Turbo,
I don't believe the the Torquer is available in a rectangular manifold. I was told that you could use oval port mainfolds on rectangular heads, but not vice versa.
I have used the Torquer II on sbc 350's in boats with great luck. If I was to go with a single plane it would be my choice. HP/TQ isn't in 7000 rpm range like most.