See here and here. I like the mount (and customer service) from PolyBushings; I try to support them (actually "him", it's a one-man operation) because he supports the A-body community -- he's now got poly engine mounts for the '62-'66 slant-6 A-bodies, for example, and poly replacement spools for the '73-up slant-6 engine mounts. Nobody else makes either of those products.