What are my options for a 400 (500ci) crossram with Max Wedge ported Indy SR's??

The old STR15 is the only option I know of.

They generally fetch $2k when the pop up, and they are far from ideal as a performance piece.

Can the STR be ported to max wedge?

[quote
Can the STR be ported to max wedge? [/quote] Not the entire length of all the runners
I would look at Indy Cylinder Heads and see if they make a low deck motor M.W. base with a removable top If so buy their cross ram top and have some fun
BTW, one of the first multiple carb motors I built for someone else was a early 383 with iron heads that we had bigger valves put in them with stock intake and exhaust port sizes with a low deck STR manifold with the original crossram top with two Holley 600 or maybe 650 CFM D.P. carbs, Isky 505T solid roller cam with a stock early 1962 727 trans and converter, that combination was a dead dog under 3500 RPM and then it turned into a real monster
The owner had agreed to using a good BM O69J converter and a lot of other good drag race parts at the start of the build and then renege when it came time to buy the other good parts
I had that happen more than once since then also

I don't know of any low deck cross ram intakes. There are not very many low deck MW intakes period. The Indy 400-3 might be the only one available at the moment. It isn't a great intake but Wilson Manifolds can turn it into something that really works.

Mopar Stage VI heads and an A&A crossram.

Yeah that combo would fit together but you'll spend a lot of money without making a lot of power.

I agree! Cross rams look cool but are wanting in performance.

Yeah I used to think that the cross ram was the way to make power since that was what the factory used on the MW cars but after we did a series of dyno tests I decided that a well designed single plane intake makes more power, I never tested a custom built sheet metal cross ram so perhaps one of those would work even better.

I already have a new Indy single 4150 intake for low deck but love the look of a crossram. Not sure I want to loose a bunch of HP though

The cross-ram (413 Chrysler F, G 413 RB; 383 B, MW) was specifically designed with runner length to add torque based on the engine's power rage (2,800 and 5,500?). Small plenums, small carburetors, and high velocity in the runners. Since the left and right manifolds are separate castings, an original manifold ($$$!) will bolt to any B/RB engine, shorten and re-attach the runners to your calculations.
I spent many happy hours in an air-conditioned 300F convertible back in the day, and its "manners" never betrayed the plumbing under the hood.
Too long for big cams an good heads.

What would a manifold be with runner length tuned for 7,000?
Tunnel ram - the runners just extend vertically.

The Weiand 6-Pack offers some ideas, see my comments here: http://victorylibrary.com/mopar/weiand.htm

You forgot to mention that Chrysler made three different intake runner lengths from 1959 to 1964 in the 300 Letter cars, long length with the divider from the carb plenum to the heads, medium length runners with a small amount of the divider wall removed near the heads and the shortest ones that had no wall between the runners up to around the middle of the manifolds from the heads: scope:
I think the last ones where the shortest ones and probably made the best combination of power from the idle and low RPM (under 2500 RPM) light part throttle operations up to wide open throttle

What happened to you running the Modman? I think it has potential and we'll know soon. With the runner extensions, I'd put it ahead of a single 4 in power. That is with 2 AFB's.