Looking at the forums on driveline, I need information on rear transmission supports. I’m putting a 1964 SM420 into my 1951 1/2 ton truck that use to have a 3 speed in it. I think I read that the bolt pattern on the bellhousing is the same but I couldn’t see agreement on whether or not as SM420 needed a rear transmission support. There is a cross member under the truck there but it is farther back than the length of the SM420. The flat plate with 6 oval holes was used to support the car? 3 speed but it doesn’t have the l-bracket with the two holes, just the flat plate. Please advise what is the proper support/ nonsupport. As always, this site is a wealth of information. Thanks.
