Well i bought an adjustable double row, roller timing chain set. Its a very nice piece, but i have a problem....Im confused!!!! This thing has no paperwork on it. To set it at stock, i know to put it at tdc on #1 and the timing marks will be at 12:00 on the cam, and 12:00 on the crank. But what do i do to set it to advance? There are keys cut in at different angles from zero, and i want to advance it. If im thinking right, and im not sure that i am, i should set it zero..tdc on #1,(12:00, 12:00) and then roll the crankshaft to the advance position with the chain not in place. Is this even close to what im supposed to be doing? I dont think this would be right, because there are different positions for the keys. Please steer me the right way, im trying to get my kids car running nice and tight with bolt on mods before he starts looking for a 350. His car is a 91 camaro rs, 305, tbi, with underdrive pulley set, tbi risers, modded chip, and some other sTuff i could bolt on for a bit more low end power. Any help is appreciated, id like to fire it back up by tomorrow evening.

Install it straight up using the 0 mark on the gear unless you intend to use a degree wheel to degree the cam.

Although both timing marks need to be straight up for #1 TDC, it's easier to line them up if the cam gear mark is at BDC. This will be #6 TDC. Once installed, rotate the crank one full revolution and #1 will be at TDC.

So put it back together without any advance? I was hoping to put some advance on the camshaft timing.

Many cams have advance built into them. Without checking valve timing and piston to valve clearance, you shouldn't randomly change the cam timing.

The extra advance/retard marks on the crank gear are a tuning aid. You start by installing it straight up and see what kind of power it produces. You then advance or retard the cam timing to move the powerband around.