Ftyler, at once I build a high performance 250 for a frined of mine, 10/1 CR, 290' cam, Clifford intaje and a 390 double pumper, that I found used in a swap meet at Old Bridge Township Raceway Park (E-town, NJ), it was just perfect for the porpose, but used a lot of gas. There is a Holley 450cfm, mec. secondaries but no pump in the rear, and single inlet. I see that this is the carb for a stock 250. But may require some jetting job.
