I have a 1969 boss 302. It has been sitting for around a year. I changed the oil and changed plugs. Now have tried to crank. I am receiving no spark from the coil determined coil was bad. Replaced coil with a MSD Blaster 2. Still no spark when grounded coil through distributor. Manually Grounded coil to battery neg. Now I have spark and it has good spark. Checked my points and they are good and clean. Replaced my condenser. Still no fire when grounded though the distributor. Have spark when grounded to battery neg. What am i missing?