For those wondering about the motor mounts.
I trimmed a some 3" angle to fit on the frame.
I used some thin stiff cardboard and made a sleeve that would fit around the 2x3 tubing and was shorter than the distance from the engine to the frame. Then I slid the sleeve off the tubing and taped it to the engine side.
Using a hot glue gun, I glued pieces of cardboard to the sleeve, conforming to the angle on the frame.
I removed the cardboard template and slid it over the tubing. After marking around it, I removed the template and cut it out using a cut off wheel on a 4 1/2" angle grinder.
Test fit, tack, remove and finish weld.
I used foam core board the first time and couldn't get a good fit. It was too thick. After I switched to the thin cardboard, it was a snap.
Maybe crude, but it worked.