I was going to use low deck M1 single plane, make my own adapters instead of the mopar dogleg adapters, but that's not going to work. Figured this intake plenum would be best over RB manifold. I have port matched Street Dominator, but think there might be newer tech that'll work better. Has moderate solid roller by porter heads. I'd really like to use my TQ also.

Thanks,
Jim.

Is it a race car only or a street car ? We use the Performer RPM on my sons 400 but its a street car. But it is faster with the RPM over the Holley Street Dominator by a half a tenth even though it was 1 less mph then the Holley SD. The RPM was just better in the 1/8 enough that the SD ran a 1/2 tenth slower in the 1/4 with 1 more mph. And we use 750 DP on it. But his is a street car as he loves how it runs on the street with the RPM on it. Ron

my stage 6's are MW & i'm using a Super Victor 440 manifold with a Dominator flange but have a 950 Quickfuel dual pattern carb.
This is a little more than what you're planning but for my application this is a killer combo. Last weekend with only the primaries on the carb activating, we pulled a 10.7 1/4 mile out of it. I'm trying to slow the car to run in our 11.00 second street class but the engine is not having a bar of it. my engine is a 512 & the car is a 71 'cuda & the driver is a girl, not that it means much. i had the car slowed to a 10.98 a few weeks back but the weather last weekend had fat ladies singing & our stars were perfectly alined. we had PB's over most classes due to awesome conditions.
i would be recomending a victor manifold if they're anything like my bigger Super Victor.

Thanks guys. Looks like, I'm kinda in between Ron and rebel. Any other recommendations? I'm just afraid an RB manifold will have too much plenum.
Thanks,

how much stall in the converter do you have? i went my route to get the biggest plenum so it would rev to hell n back. it seems to be working.

Thanks guys. Looks like, I'm kinda in between Ron and rebel. Any other recommendations? I'm just afraid an RB manifold will have too much plenum.
Thanks,

Why don't you just use the RB M1 intake? It should fit a low deck with Stage VI heads and it has the Thermoquad pattern on it.

That's definite option, need to find old mopar perf catalog for part number all the new stuff is square..

rebel in long term progress, guessing would like tight 9" around 4500.

Common swap meet item. The M1 manifolds are not hard to find at all, probably some for sale in the classifieds on this board.

In general RB intakes are better because the runner extra length allows it to go around the manifold bolt where the shorter B runner may have a dent for the bolt.

Also there has been more development on RB intakes over the years.

That's my

R.