valve cover had to come off? i took all the pull brackets off the rear of the engine, my huge gorilla hands fit back there no problem.

the cross over pipe is 2.25 band clamps, the down pipe is 3 inch band clamps. put the band clamp on the rear header first, then put the pipe in the rear header. the front one you can put on after the fact, theres no room in the back to install it later one.