It has been a good bit quicker since.
With all the ballast out it weighs 3495. I typically run it at 9.75 because its not as violent.

Not sure that you see this but, this is exactly what I knew but, I just wasn't going to call him to pick his brain and not make a purchase. Just the same if one of us makes a solid improvement, it just might benefit the company. Ken has always been helpful sharing what he knows. They could cast them with more runner but, then you'd still get someone cutting them out like you see frequently done on the single planes claiming that's the solution. Makes me wonder what Wilson didn't know when they modified your intakes lol.

Darin Morgan says the flat floors are best in an intake because of the pulsing between the cylinders. He said a vertical divider was the worst he ever tested. Wet flow is hard to predict from what I've read about it.

Worst for he was doing.
For Chrysler, it was the smallest, cheapest, lightest design to add a 2nd 4 bbl.

Horses for courses

Its a shame a dual carburetor under hood intake manifold is simply not made for the 340 360 mopar. Offenhauser still makes a unit but its design is for the 273 heads. It will bolt to 340 heads but its not ideal and its a design from the 1960s. Ford and Chevy have dual plane dual quad manifolds in traditional and airgap versions and from multiple manufactures. I like tunnel rams but I really like under hood dual quad setups. Harkens back to a time where to go faster- you absolutely had to add another carburetor!

The Mod Man is available for LA, Magnum, and W2 Mopar, along with a variety of tops.

Although, these days “available” is a relative term.

I had a customer try one on a 470.
He was running a 400-2, but wanted to play in the NSS stuff.
4 speed car, And he used Ede carbs.
I seem to think the big problem he had with it was a stumble right after the launch.
I don’t recall there being a big speed difference at the top end between the two.

a stumble right after the launch

That's what the divider cures, by reducing plenum volume by 50%.

Very much appreciated and thanks for sharing. I think the best cure would be a 'pump-shot' type of carb(S ). Whatever I do to the plenum I will take into account a compromise between ideal volume, packaging limits, and fuel distribution. It's unlikely the plenum will be significantly smaller than it is now in volume.

It's getting to be where the intake is about the last thing needing to be done, finally getting around to it.

I lowered the floor some. The plenum will have some awkwardly shaped wood in 4places to help lengthen the runners and 'bellmouth' the extensions. I'm not sure I'll be adding much of a center divider. I do not feel it needs ANY reduction in volume for any application, if anything that bridge down the center helps RUNNER LENGTH. If we could afford more delays I would split the top and locate the carbs more central to the ports. IN THIS PIC the runner roof was just roughed-in quickly AT THE PLENUM to see better the rest of the as-cast alignments.

General roughed runner extensions and their approx. placement.

"filler' idears...

I've been doing 'other things' so this went on a backburner but this is essentially what I'll try. There will be a TWO inch spacer above this and then one additional change was Scott buying the INDY "EFI" 2 AFB top which spreads the carbs apart a touch more so they are better over each runner. Talked with a few that run the modman and run well and there some basically unmodified in the plenum. That said, we could baseline it without the plenum mods..AH, NO!

Getting closer to epoxy...life happens in the meantime.

Hey hey...you're giving away our secrets! Lol

This spacer was not done by me. Credit goes to Scott's long-time friend Dave. He's good, I'm a hillbilly.

All the 'tricks' aren't disclosed, lol. Truth being I'd like to see Indy revise the lower casting because if this works you'd think it would sell at a premium price. Thought myself about making 'insert kits' a guy could rub and then epoxy together because...it's probably going to be better than a single 4 no-matter how bad I am.

I like it!
AFAIK the ideal shape for the divider nose isn't a knife blade (frequently seen), but a full radius, where the diameter = divider thickness.

All this work just to try and beat the old man.
Doug