Have you seen the factory paperwork Stefano? I'd like to have a copy for the registry if possible.

If anyone has factory paperwork or original owner statements regarding the "as delivered" drivetrain configuration of this car - please provide details. We do our best to maintain registry accuracy & hesitate to make changes without solid documentation.

The GM paperwork I have for this Yenko is a Copy of the MSO, which has shipping weight as well as a copy the "Delivery Schedule" from GMAC along with the invoiced / floor plan credit.

The sheet includes a Yenko Chevelle and deliveries to another Yenko Network dealer to include Chevelles and a Camaro.

These copies were provided to one of the previous owners by Yenko Performance & Marine from 1983.

Ok, I must be slow. I don't believe that any of those documents specify the transmission type? Or has somebody figured it out from the shipping weight given on the MSO?

Would the invoice price not be on the floor plan sheet? The TH400 was about $100 more expensive than the M21.
Since yenkos were ordered with certain equipment couldn't the trans be deduced from the total invoice?

There were no 9561 AA VS 9561 BA designations were there?

AA designates 4-speed COPOs; BA automatics