Take them injectors out and put the stock ones back in maybe? Or take those 60's and make a little tester... I use a 2' long end of an air hose I cut then take the o ring off the top of the injector, stick it in the air hose(fits good in the standard 3/8's) put a little clamp on it, then fill the hose with your choice of cleaner... I like carb cleaner or maybe some b12 chemtool then hook your air hose from the compressor up and then use something like a battery charger to give the injector 12 volts so it will open and fire all that cleaner through it and watch the spray pattern for incosistancies also. I can't think of anything else, sounds like everything has been checked minus injector flow. And don't be afraid to flick that 12v on and off the injector either they are meant to fire like that...
