I just went through the specs again. The frame is .020" thicker throughout length. Other thing different is rear axle has bigger 10.75" ring gear and larger/thicker axle tubes. Also uses more leafs in rear springs. Base curb weight is only 136 lbs different, mostly in rear.
The tire would not get unto position. Was close enough that possibly letting all air out, it may have worked.
I will move racecar back a foot on trailer and move trailer spares to side mounts behind trailer axle. That will ease tongue weight.
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