is this (stock) trans a lock up version?

 

C = clutch = lockup

I didn't think those were Cs, I thought they were plain 200s in these cars for some reason, but I don't really know anything about the 6-cylinder cars.

I also didn't think 83s still came with 200s, I thought they swapped over to the 700 that year; but again, the 6-cyl cars might be different from the V8s

 

actually i believe that the 84 year was first for v6 700's
mine is a 3spd 200c
go figure... any way in case some one needs to know i've been told that the drive shaft from these (200c) are the length needed for a th350 swap.

 

Yep its a lockup, 81 2nd gen, 82-83 thirdgen, V8 or V6. Yes the drive line is the same as Th350 but you need to go aftermarket for the tq arm brace.