We have a 1987 Monte with a 350 motor. We had to open the motor to put in new rods, and had to take off the intake manifold to replace the gasket. We put it back together and put the distributor back on the same way it was, but we cannot get it to start now. The engine will crank but will not start. We lined up the distributor with the #1 piston but that did not work. Is there something we missed? Really want it to start again.