I guess I'm needing some more assistance, so here we go . I changed the distributor, put a new ac cap an rotor, ac plugs and about 100' of vacuum line and it's still running rough so I'm down to plug wires or the spider I think. I did the leak down test and it passed, could the spider still be defective? Could it be clogged, I had the upper plenum off and turned the key on and I didn't see any leaks....any input from anyone would be appreciated.

 

my next step is to change the intake gasket, I'm understanding that these intake gaskets can fail on the inside, has anyone experienced this?