I've fixed a few warped Tillotson's and Marvel's.
What I do is clamp them together and apply heat using a heat gun. As it heats up, tighten the clamps somewhat. Leave clamps on, let it cool and repeat several times until the surfaces mate up. If you overtighten the clamps you could crack...
I've been battling a similar scenario this week with my 28 Truck. I'm usually really good at figuring out why Model 'A's don't start but this week was a real challenge. I determined it was without a doubt an electrical problem. Test lights seemed to indicate good electrical connections to the...
There are some foreign aftermarket floats that are too big and will cause the condition you describe. Recently I tried using a foreign aftermarket float and had the same circumstance. Ended up using a different float and got rid of the foreign aftermarket one. Get the USA made ones if you can.
After extensive research I also bought a cabinet from Skat Blast and it really is top quality. It comes all put together too PLUS they advertise in either MAFCA or MARC magazine (can't remember which) which supports our hobby.
I highly recommend Skat Blast for anyone looking for a blast...
Even though you inspected the axle keys, I'll mention that No forward and reverse were symptoms I had when I sheared off a rear axle last year. It sheared just before the back of the key.