For what it's worth, my '51 3100 used the two mount system. It looks like the crossmembers were shared with 3100 thru 3800 at least, as my front crossmember had holes for both the single center and two side mounts. So I guess you could use either radiator mount system.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
