Trimmed the excess from the inside of the plenum, and around both sides of the glassed area. The vents turned out very sturdy, and line up great with the lower cowling inlet vents. Drilled the plenums to the radiator frames and added hardware to secure. Now it's on to other areas of the cowling.
Right side plenum with 4" inlet glassed in place
A look with the cowling halfs in place
A look at the left side peeking in from the opening behind the spinner. Gaps will have rubber sleeve.