I think its a 4 speed car. Looks like the clutch pedal is up under the dash, and there could be a 4 speed hump under that carpet where that butt ugly auto shifter is.
I wouldn't call it butchered though. Definitely not all original, but all original is boring anyway. The high back seats are probably harder to come by than the low backs, and if the tracks are right they're worth more too. No mention at all about the dash, which is interesting. I seriously doubt that's a bolt in mod, but the dash doesn't appear to be hacked up too bad in the pictures. That would warrant a closer look for sure.
The whole ad is here. He's a little high on the price, but most people trying to sell are.
http://stlouis.craigslist.org/cto/4548874267.html