I have a front plate, fore/aft limiter, and a poly trans mount on my cuda.
My road runner has a front plate, one stock motor mount as a fore/aft limiter, and a rubber trans mount.

A solid trans mount isn't a good idea.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 4 speed, Dana 60
'71 Demon 340, no drivetrain, on blocks behind the barn
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax