12/1/21 UPDATE;
I found the kit to repair my loco.
For those of you in a similar situation, I provide a little helpful info.
After several days of back and forth with the folks at MTH parts, I found out there are two different motor mount configurations. The earliest versions had a larger mount that was a good bit larger in diameter than the motors. The later versions had a smaller mount that is about the same diameter as the motor.
The frame that I received from MTH was for the later version and is not going to work on my loco. Since I wasn't able to get the correct parts from MTH, I decided to do an internet search for the frames.
I found that Trainz had 10 kits with both front and rear frames. The listing was and still is not correct. After several days of back and forth with them I was able to get enough info to purchase the kit. The kit is for the early versions with the large motor mounts. It is the complete factory kit with instructions. Trainz has it listed as an HO part, with an HO part number. I able to get them to change the description to O gauge, but could not get them to change the number. I guess it is a small win and I'll take it since I have the parts to fix my loco. For those of you that are interested look for 80-2057-1X, which is the number for the HO Veranda Turbine.
I'm at home for the next few days with the Flu, so I have time to fix my loco and hopefully it'll be back on the rails in a couple of days.
I have attached a couple of pics. One shows the three frame configurations from MTH. The one on the left is the defective early frame that is prone to warpage. The center frame is the newer style with the smaller motor mount recesses. The frames on the right are the pair that come with the kit for the larger motor mount frames. If you have the really early PS1 version, Trainz has the kit for you. They are a steal also, so jump on it if you need these.
The frame warping is the cause for derailments and removing the air tanks is just a stop gap. The frames will continue to warp until the trucks will not sit on the rails even with the tanks removed.
