[wafrederick]

It could be a worn out distribitor gear.GM does have problems with the distribitor gear.Pull the distribitor out and inspect the gear,look for shiney spots on the gear.Mark the distribitor before pulling out,the timing is not adjustable and the distribitor has to be set with a scan tool.The coolant leak could be the intake gasket.Fel Pro has an updated intake gastet set,part no. MS98000 T.The updated ones from Fel Pro are made out of metal with rubber sealing areas instead of plastic