Update:
My dad and I worked on the tractor a bit tonight. He took the carb off today and cleaned it out and blew it out a lot with the air compressor. Now, the carb sucks good when you try to start it. The blowing back problem seems to have resolved itself.
The valve cover came off and everything looks good under there and all the valves are functioning (nothing is stuck open).
We also tried cranking it over with everything put back together. She fired a few times, but it seems she's quickly flooding herself now.
We don't suspect it's a timing problem since it seemed to almost catch (fire up) tonight.
My dad's going to have the carb rebuilt by the local Allis Chalmers shop and see what that brings.
Special Thanks to Mike H for the extra help via PM.
Best to All,
Jay
P.S., Since we all like pics, here's my WD45...
