trans swap

Help needed, I have a 1961 Econoline (irrelevant) with a 1967 mustang 200 I6 and 3 speed manual. I purchased a 1974 C4 transmission and C5GP-7976-A Bellhousing. I need help purchasing the flexplate and correct torque converter. I'm getting mismatch data off of the internet. I know the 70 up C4's...

Well, now that the 200 is running well in my 66 Mustang, it's time to sort out the rest of the drive line. The weather up here is pretty crappy still, so I'm not sure when I'll have the car up on stands so I can wrassle the 3-speed out (again) and install the T5 but I now have all of the parts I...