Another option for something that is flat hood friendly is the MP 337 manifold(part number P4876337).

They haven’t been made for several years, but pop up for sale on various sites from time to time.

It’s a fairly low profile single plane, with a 4150 carb flange and MW ports.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads