Which block are you building? The 1009 was designed for the smaller bore 426,383,(4.250 size)413 and 361 blocks(4.180), not for the larger 4.320 440 bores scope
I bought the 1009 for the 413 truck block build with the bore at 4.250 I'm assembling now with 440 source heads, they barely fit properly on it shruggy

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)