Does any one know if the extra bed length in a long bed is all ahead of the rear wheels? I am using 1950 bed sides for my 41 and need to relocate the fender mounting holes. If all is forward of the rear wheels, then the relationship of bolt holes from the end of the bed will be the same on the long and short beds???? I measured a 41 short bed and there seems to be a difference of about an inch. Thanks for any help. Ron