What we need to establish is the timing on this engine. The timing chain has stretched and jumped a few teeth. That ruins the relationship between the crankshaft/camshaft and distributer.
Same thing happens if the timing chain was not replaced properly.
I'm addressing this issue of yours as if I had this engine in my garage and I was doping out the problem. So why hit you with all the possible problems I might think of and possible fixes there might be. It could get very confusing for all of us.
Do you know what was good about the good old days? I wasn't good, And I wasn't old!
Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....