I have a set of TTA H&R Poly Mounts for sale. They are for 3.8, 4.1, stage 1 or stage II motors. Comes with all hardware and special wrench. I'll e-mail pics if interested. $300.00 shipped in the Continental US
Bushings are black on the pieces that mount to the frame. They were red when I bought them and I did not like the vibration so he sent me some black busings which were softer and I replaced them. The pieces that mount to the block have red bushings. I don't know the durameter of any of them. I did not notice much difference from stock.