I have a 1989 F-150 4x4 with the 351W in it. I recently upgraded the ignition with MST Coil, Distributor,wires, K&N cool air Intake, Headman Headers and Flowmaster Exhaust. Since then i have not been able to tune it or get it timed correctly. I also noticed that the timing scale with the advance markings that is suppose to be mounted to the engine block is unlike ive seen before it has no markings to aid in timing. i can get it running good at high rpm and it dies sometimes at a light or stop sign. Or it runs like crap misfires and is very slugish Does any other owner of a truck like mine have any info that could help me out.
The timing marks are on the balancer , you will need to clean it off good , then highlight the 10 deg BTDC mark so its easy to see , remove the spout then set the base timing , a few deg advanced will help performance...Lew