I have a 59 longbed frame that was chopped up by previous owners. The trans/bellhousing support was cut off so a later model drivetrain could be used.I picked up a 54 crossmember and have drilled out the rivits from the old support. now it looks like the 54 crossmember is not as wide as the 59 frame. short by 2".And the mounting holes are a little off. Was a 54 frame narrower than my 59?