I installed a new alum. intake, headers and the holley truck avenger. Now my truck won't start. It is back firing through the carb. I figure it is something with my timing . I started at top dead center at the #1 piston and saw which wire it was pointing to and ran my wires frome there. 1863...... It is still doing it. Is it possible I have the distributor cocked a little. Where should my #1 wire on the distributor be pointing 6:00 or 5:30. Should I lift the distrib. out completely and reinstall it at 6:00. Please help winter is coming fast.