I have a 1993 Chevy K 1500 truck. It has a remanufactured 5.7 engine with no timing. I can not get any spark from the distributor but there is spark coming from the coil to the distributor. I tried replacing the top half of the distributor and didn't work so then I tried replacing the entire distributor and I still have no spark the coil is good as it was replaced and everything in the distributor as good as it was replaced. Does anybody have any suggestions?