Lynn, let me look through my paperwork for my 337. I'll mail you a copy. I may be wrong, there may be an STC for it and I have it- we'll see.
Installation? I'll try to get some pictures of how mine were installed. Maybe that'll help.
Why don't you just come on down to the "sunny" south (37 deg. F outside right now)?
Gee Lynn- did you say you have a Lycoming? I'm gonna get shot for this, but I would split it just like a Cessna cowl, add camlock, dzeus, whatever fastners to one side, rivet a long strip to the back of the other side with the camlock receivers, sit back, and smile alot.
You might consider riveting the receiver strip on before separating the two pieces completely, drilling the fastner holes through the cowl and receiver strip at the same time to ensure alignment.
Sure wish you didn't have to do this, but pulling the prop every single time has GOT to be a pain in the buttocks :roll: