Remember practice makes perfect. Make sure you are not 180 off. Plus check the firing order on how your wires are set remember from 1 on the distributor 18436572 clockwise. I have had the problem to with having the valve lash wrong. Plus too thick of oil may have caused your lifters to seize. Try running some 30 w oil through it for a couple hours and then set your valves again. This would help the lifters out and then change your oil again to your regular oil weight. Try to stay away from oil additives such as Lucas oil unless your oiling system is set up...