I have a set of web cams adjustable sprockets that i will be able to turn loose in a week or so. I paid $180 for a pair of these. they have never been welded on, instead i cam up with a better method of keeping the gears from spinning. You can see in the pic below the set screw. It acts like a key to keep the gears from turning. To install the same way i have them (i will include a few extra set screws with the gears and let you know what tap you need) you will need a dremel. you'll grind a small groove, and line up the grove on the cam...press the gear on and run the tap in. it may sound hard but its not.
price: $90 shipped in the us





as you can see in the pic there is no wear on these and they are in perfect condition.

And as always i'm open to offers. dont be shy. i also have a 540 grind intake cam...it will work great with a 540 exhaust if you have the 288/540 cams. $75 shipped

what exactlt do these do? are they to adjust the cams?

Yes its to adjust the cam timing. and now that i figured out how to degree them and change cam timing so easily with them...im gonna keep em.