Trying to finish up my -9 o-320 FP. The cowling was sent in early 2019 and because of a move and family problems shortly after delivery, my inventory check was not thorough. Not really knowing that much about cowlings, I saw a cowling and checked the box on the inventory. Fast forward a year- trying to install over a FAB, hmm, doesn’t fit! Looking closer, tag that is glassed in the corner of cowling says “IO360”. So seeing $$$ signs trying to figure out how to ship back to Vans for the correct cowling, I called Vans, tech support told me to cut out the bottom of the cowling and drop in the -6 scoop and glass it in. I’m fixing to make the final mating cuts. Was going to cut each piece within a quarter of an inch of each other then grind a scarf angle on each piece so the scoop fits slightly into the cowling then start glassing them together. Does this seem like the right thing to do? What should I use to make this scarf joint? Thanks in advance!