Form and fit Part 12 and Part 15. Part 15 is installed using 2 existing engine bolts. The bend on this part had to be adjusted to line up with the orientation of the back bulkheads. Had to do the adjustment a bit at a time, but it all worked out OK. I had to trim the back end of part 12 to fit the distance to the front bulkhead. Again I had to make a lot of small adjustments.