Hello, I need to appeal to every ones good nature and knowledge. I have a 1973 Yale G83P-050-SAT-086 Serial # A271738 and i am having a hello of a time getting this thing to run. I have replaced the distributor, plugs, cap, rotor. ign. coil, and the ballast resistor. Now i believe a mouse got into the dash wiring and had a field day. Now all the wires are the same color and are so old that they crumble under your touch. After a fair bit I got it to turn over but had no spark. My distributor had so much play up and down it broke the rotor in side the cap. I replaced the distributor, cap and rotor. still no spark. I replaced the coil and ballast resistor. Now i have spark but loose voltage during crank. So I tested the voltage during crank and it was at less than 5v. So I installed a relay to apply battery voltage during crank only. Now I have spark and no fuel. It ran for two seconds after i poured an alternate fuel down the LPG mixer. Took apart the LPG regulator an it was so full of sludge that i new it couldn't allow LPG to pass through. Rebuilt it. Now I have fuel, Try again, now I have no spark again. This is driving me insane let alone the costs are elevating. I ordered a third coil t see what it will do. I have contacted my local dealer and tried contacting Yale. But I can not get a hold of them. Most dealers can't go back beyond the year 2000. They don't seem to want to go back to the archives and look in the books. Again any help would be very much appreciated. thank you in advance.