Failed Emissions 94 mighty max 2.4l

Ok so my hydrocarbons are supposed to be at 160 and on my first test came back at 313.... Realizing the truck was running a little rough I retimed it (was way off) brought the timing back to 5 degrees before top dead center with the ignition wire grounded. Pulled my plugs checked the gap (plugs are new) put them back in the truck. I fired the truck up which was now running better and figured i would go give it a shot again. Well I still failed but received a better failing score! My hydrocarbons were now down to 260 or something like that. Now for a bit of history on the truck bought it running like crap and wound up replacing a messed up injector. Truck ran way better then before but based on my failed emissions it still isn't perfect. Any suggestions? I am not opposed to "temporary" fixes just for the sake of passing......
A picture of the truck in question

Catalytic converter possibly

Pull the o2 sensor out its after the cat on the piping. Pull it out an see if its white or black. White no good black good.

im having a similar issue and putting all my time into fixing it,, ill keep you updated on what i find.

looks like my tune-up did the trick, i did tear apart all the air management system and clean everything,,, Then a few short minutes later realized my harmonic balancer had walked itself out, the main bolt was almost all the way out , retimed everything,, runs good as new, hope this helps