I understand an Edelbrock FM255 intake manifold will mount two Holley 4100's straight.  I would like to use two Holley 465s with adapters.  I have been told an Edelbrock 257 would require side mounting 4100s. I understand the FM 255 was designed for small port heads.  Will a FM255 and two Holley 4100s mounted straight work with 1957 "G" heads on the street.  Thanks!