Putting an 0-200 in a C model Coupe "should" be pretty simple. First you will need to find copies of 337s with field approval for the installation. Perhaps someone on this list or John at Skyport can help. If not do a search of the database for C models with the 0-200 engines and either contact the owners or order the CD-ROM on-line to obtain the 337s Your IA submits your 337 for approval using the previously approved 337s as acceptable data. He then duplicates the installation for your airplane. If the previously approved 337 used for acceptable data was based on Skyport's STC then you too must purchase the STC.
If you cannot find a previously approved 337, then your IA may submit a 337 based on Skyport's STC stressing the similarity between the models. I did this to get approval for an 0-200 installation in an Alon A2A. Cheers: Paul N1431A KPLU
