I'm more likely to get a new 6v battery just to get the truck running decent and then look into converting 12v it later.
Thanks Guys for your advice.
Friend and I are in the project together and the truck is getting moved to his house where it will be parked with his 3 Macks! The truck gets moved off the farmer's property in a couple of days. I get more pics and loaded them up Stovebolt Gallery within a week.