Correct 68 GT350 C4

[CS350Conv]

My 68 GT350 had it's C4 replaced by Aamco sometime in the early 70s. It was replaced with a 65-66 C4 but it looks like they put the original valve body back in (tag # 2T 3). I bought a used 68 302 4V from a 68 Cougar (tag# PEE S) to rebuild but  I have a few questions. The valve body tag on the 68 is P3 3, I have not been able to find any information on this. The intermediate servo is an H cover which I believe is correct. The tailshaft housing has the mounting for a vibration damper weight unique to the 68 Cougar but what is the correct housing for the 68 Shelby, the one with the 3 holes (casting #C7OP-7A040-A or the 65-67 style casting #RF-C6DP-7A040-A? Or is there another style that I haven't seen yet? The Marti Tag Book indicates that the Shelby should have a tag# PEE-SC. What was the difference between a PEE-S and a PEE-SC? Thank You for any information you can provide.

[Coralsnake]

Build sheets indicate "PEE-S"