[bettlesr]

Gavin:
I welded up the slot that limited the amount of advance and then milled the slot shorter to get the amount of advance I wanted. I removed the upper plate and slotted the hole for the mounting screw and put the screw in loose and held in place with Locktite. This allowed me to retard the advance for climbing hills, about 5°. I set the initial timing to 10° btdc with the lever all the way DOWN. This gave me good performance off the line and limited the total to about 25° for cruising and still drop back to around 20 for heavy loads.
Good luck
Dick