My what will it run?

The welding was to make it a sq. flange opening. my porter said this would be a better intake than the vic , wants me to run a 2in spacer. carb is a 4150. i also have a 750 that flows 1036 gas carb i will try. 3300 is with me in it, car ran 11.70/11.80's with a mp 557 cam, same intake unported, 202 valve mild cleaned up heads, 750 bg carb, 3500 stall. the heads flow alot better now he also took out the pinch in the heads. also with a 100 shot on old combo ran 10.90's. i am hoping to go low 11-to 10.9 on motor then spray the 100 shot or less, want to run a 10.50 heads up class.