I have checked the intake centerline on complete motors to verify that it is or is not the cause of a poorly running engine. First verify tdc is correct on the balancer with a piston stop. Then connect a dial indicator to #1 intake pushrod. I use the .050 before and after method. Mark the balancer accordingly. Mearsure the circumference of the balancer. Divide by 360. Now you know distance in inches per degree. Measure and do the math.