car still diseling run on prob

ughh Took the block off the back...cuz it did have one...has no PV but had 82 jets in it.. So I put 72s in it...Started it up took it round the block.. checked the plugs..kinda look like there bout to turn brownish...no more gas/oil on them. And tommrow Im going to take it on the high way and run it and get the carbon out and check the plugs