68 Barracuda original /6 with 4-Speed?

After turning my brain to mush searching and searching, I've finally figured that I should consult the experts!

Did Chrysler put a 4-Speed mated to a /6 in 1968? I am kinda fuzzy on this issue.

Here's the skinny: I just bought a 1968 Barracuda Fastback ( with a 360 and a 4-Speed ) that was originally a /6. I think the trans is original, but I am having problems finding anything in print that it is.

Can anyone out there in 4-Speed land help me out. Any and all help would be totally great!!

Thanks in advance,
One thing is for sure if the trans looks like it came with the car (68 Barracuda) The car would have been a V8 car, the slant six would have to have a deferent bell housing to match up to a V8.
These slant six Barracuda's did come out with three speeds in the floor and a four speed could have been added, It would take a Vine # or build plate to be sure. Welcome to this great site, A /6 guru could answer this question in the slant six forum here.