Hi Harry,
  Well, I finally got the museum's Oliver RC 70 back together after putting in a new gas tank and putting a new sediment bowl directly under the tank (it use to be mounted to the engine block).  I put in new spark plugs, but I think the battery is junk.  Its a 6-volt/positive ground system.  If I go get a new battery, are there options to get the highest cranking amps possible-if you know what I'm getting at? 

  I can hardly get it to crank over.  I jumped it (very carefully-making sure I didn't cross polarity!) with my car, but still can't get it to crank over with enough power to give it a chance to fire.  I haven't started it in 2 years.

  Any tips/tricks you Oliver service reps used???

Thanks,
Travis C.