1. Cut and fitted a very small aluminum angle to fit along the upper edge of the new blister cutout of the oil cooler plenum, and bonded it in place. This will act as a stop for the butterfly valve, to prevent it from cutting into the fiberglass plenum if I end up pulling the valve open too far.
2. Fitted the butterfly valve and shaft blocks in place, and made further locating marks in the approximate place they will go.
3. Taped the baffle doubler plate in place. Located, marked, spaced, and drilled the rivet attachment holes for the doubler.
4. Located, marked, drilled, and deburred the holes in the baffle for the spark plug pass-through and the R mag cooling hose flange.
5. Clecoed on the #3 cylinder baffle. Located and match-drilled the holes for the butterfly valve attach block.
6. Fitted the valve and checked for clearances.