Which intake manifold

I am currently building a 493 RB with the Indy dual plane now for my 71 demon. Also a street car with trick flow 270’s, 11.5 to 1 compression, and a solid flat tappet cam with 275 @ .050 duration. I’m only looking to run mid 10’s and picked the Indy for improved street manors, to avoid hood clearance issues and the fact that it was available. Originally wanted the 337 M1 single plane but have had no luck finding one.