One way to check your chain being sloppy is to check manually.
Pull the cap off the distributor and index the rotor with a witness mark.
Watching the rotor, ( you might want to disconnect the batt cable) grab the fan and rotate it by hand. Move it a little CW then CCW.
The bug should track with no backlash. The factory timing chains and gears SUCK !!
No reputable shop would do a rebuild without one, and I'll bet it was included in your anj hix.
If you end up pulling the dizzy, put back a DII. Best mod I ever made.