Okay with the factory timing chain, got the dots lined up. the pointer on the balancer is at 0 TDC started the truck and turned the Distributor to 12 BTDC shut the truck off hooked up the vac advance and the timing looks like its at 30 BTDC its just not making sence to me how the timing can fall back that far.
Could it be a issue with the vac advance.
Could it be a issue with the vac advance.