Carb and Intake for 5.2 Magnum

I mentioned fuel economy to try stay away from discussions about 750 cfm carbs, cams , head swaps ect.. I totally understand the benefits of the MPFI and would chose it over a carb set up any day but i have good reason for changing to a carb setup.
The Stude was last on the road in 1973 so i need to create a new technical document for it and to do this i have to take it for an inspection where they measure it, check what equipment it has ect.. so basically creating a spec sheet, then they do the road worthy test. If they pop the hood and see an old looking engine with a carb all they'll ask is what cc it is as none of them will know the difference between a Stude, Chevy or Mopar V8 however if they see a fuel injection system then they will assume i have fitted a modern engine which will open up a whole new can of worms which could cost me up to €2,000 and take 2 years to get the car on the road. Spain is the hardest country in Europe to modify your car, just to fit a performance exhaust you need a homologation certificate and engineers inspection. So the plan is dress the engine up to look like it was made in the 60's then after i have all the documents i'll put the MPFI back on it.
I have a LA 318 with 904 trans that i am thinking of fitting in another car i have, they need a total rebuild but the carb is broken and distributor is missing so i thought i could use the parts i buy for the Magnum on the next project after i refit the MPFI, for this reason i was interested in the Crosswind manifold as it has bolt holes for Magnum and LA, the Speedmaster also states it is for both engines but can only find a basic description.
I would have mentioned all this in my first post but i was trying to keep it simple and to the point. So basically just looking for a temp carb set up for my Magnum that i can later transfer on to the LA which i will be changing cams on so i could match the cams to the manifold.