Para 1-6. Build up muffler isolators and install the muffler to the engine mount. I will need to remove the muffler as para 5 instructions must be incorrect as the parts assembled this way interfer with the engine mount tubing. Photos I have found confirm this.
Both muffler atttach channels need to be installed with the flanges pointing down, not one up and one down. If is the flanges that hit the tubing on the engine mount.