Hi Dennis,

Not sure about the frame, but a traditional motor is too wide for the long hood. It can only fit in the wider cab end of a Geep.

Alan

I can see that being a limitation. That probably explains why Lionel never made a 2 motor GP. Actually the one motor unit is a pretty strong puller. If you think about it all steam locos of the P/W and MPC period were one motor and they pulled fine. If the geep can pull 9 freight cars with the fast angle/needle bearing wheels they can run on the layout fine.  I will try this tonight.  

Did you see my thread on adding a motor to the Phantom locomotive?  I got the second motor from an MPC era GP9.  You do need to hog out the frame for the motor, and you'll also need to either fabricate a motor mounting plate or steal one from an old GP chassis, I did the latter.  Here's how I did it.

Improving the Lionel Phantom Locomotive

Don't know about the fit of the motor, it had no issues in the Phantom shell.

The Phantom has a lot more room to work with, another open frame motor will not fit inside the hood end of a GP.

One possibility is to use a DC motored Blomberg truck from a newer starter set GP. It may very well be a bolt-up(or close) proposition. You will have to isolate the open frame motor field from ground, and run the open frame motor on DC(with the field(or brushes) wired for one-direction DC) wired in parallel to the DC truck. The E-Unit is capable of switching DC for both motors. This would require only the addition of two FWB rectifiers.

I have an mpc era gp that I wanted two motors in as well.  Its a bit of a headache.  The traditional motor is too wide for the long hood and the frame would need cut.  The unpowered truck is nearly identical in mounting to a k-line truck with the motor in the truck assembly but then it wouldn't match the front. 

I finally settled on donating a WBB gp7 I got for $100 when they were on blowout clearance.  With a little bit a plastic removal, the mpc body fit nicely onto the wbb frame. I still need to get around to finishing the handrails though....

The K-Line MP-15 truck is another option with my method above - it's almost identical to the 8369-101 Lionel motor truck.

Here's the K-Line version:

The motor trucks make for a high-riding loco.  To increase power you could add a little weight in the fuel tank area, but I wouldn't go overboard.  Run it long hood forward with the motor in the rear.

In the early diesel era Geeps seldom ran singly.  We used to see five or six on the head of a long freight.  Why not do what the real RRs did and just add another engine?  I would guess that two postwar Geeps could pull a train 30 feet long assuming that most of the cars had fast-angle wheels.  FWIW.  -Ted

I have taken a Lionel Geep shell and mounted it on a Williams frame.

I looked at my GP-7, and I can see why the AC motor isn't an option, I wasn't thinking of the close quarters.

The "cheapo" traditional geeps of the 2000 is your better bet as they used small can motors vertically or in the truck itself. Actually your better bet is Williams for Dual motor conversion geeps.