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C- The hardware supplied with the "Mr. Gasket" adapter was crap, I went to a hardware store to get longer and better quality bolts. The bolts that hold the adapter DOWN are 5/16's fine thread machine head bolts. You MUST have machine head bolts. The kit came with 1 inch bolts, I could not get good threads so i got 1 1/4 inch bolts.
The bolts captured in the spacer that point up are 5/16's fine thread, the kit comes with 1 inch bolts that are just a tad to short. One of mine stripped so I got 4 inch and a half long bolts, 4 washers and 4 new nuts.
A- You can losen the black cap and twist it to adjust your choke. More info on this can be found I am sure, my plan is to wait until a really cold morning and adjust it closed. For now it opens fine when the engine is warm.
B- These are idle air/fuel mixture adjusters. This is simple, run them all the way in until they stop. Back the screws out 3 1/2 turns and start your truck, start with the left screw and screw it in slowly until the engine starts to die. Once the engine starts to slow down back it out a half turn and move to the other screw doing the same thing. Keep going between the two screws until the mixture is perfect and then back them both off in between 1/4 and 1/2 turn.