I had the same problem on my 51.....
figured out that what was sticking everything tigher than heck was a combination of my parking brake cables and the crossbar being stuck.
A few rapps with on the crossbar made it want to move, a powerfull stomp to the e-brake snaped the cable to the left rear ! eek !

SOOO...
disconnect the cables to the drum and then work on the crossbar.
good luck.


Build 'em to Drive 'em