Hey Mike, Just a thought.... Where is your ground wire from the battery attached? I have usually found that attaching the ground wire to a starter bolt seems to work the best. Hope you get it figured out, The truck is looking good!
(2) 1954 3100's / foster parent - SOLD 1955.1 3100 Resto in progress 1971 GMC 2500 Custom / foster parent 1951 M37 Lawn ornament 1949 3800 Panel Resto in progress 1959 GMC 100 LB Fleetside