im about to drop in a 331 longblock, tf heads, b31 afm cam, 9.2:1, sc-trim. i have 42 lb injectors and i sent out the maf to get recalibrated for this setup. what else do i need to do to make it run good. will i definitely need a custom tune and who does it near westchester ny. can i get away with a tweecer and is it hard to use. i have basic auto knowledge. any help would be greatly appreciated