Overdrive Options

Then your only real options are the Passon A855 for $4300 or a used A833OD, plus the parts to swap your car to a 4 speed if it isn't already one...
Yeah, that or the gear vendor. However, I have been told that in order to put a gear vendor into an A-body, you have to use the short tailshaft 727 transmission from a ?van?. If you use the standard length transmission, the driveshaft will end up being too short and will give you bad vibes.

I really don't want to mess with the sheetmetal on my automatic 383-S car so it will get a Gear Vendor unit.