That's a B engine or possibly an RB. The displacement should be stamped on a pad near the distributor. B engine displacements are 350, 361, 383 (B) and 400 with a deck height of 9.980". RB engine displacements are 383 (RB), 413, 426 (Wedge), and 440 with a deck height of 10.725".
You really need to be sure which engine block and heads you have before selecting an intake.
By the way, kudos for attempting Mopar power.