kk got the pics please note I'm NOT going to actually drill mine as mines the new style but I will be as detailed as I possible can
First picture I have the Inner debris door propped open with a drillbit so you can see down the Cylinders key Channel
Shine a flashlight down yours Im not sure if the old style has a trapdoor to keep debris out either way when you look down it you will see little gold tumblers hanging down
you need to get a drillbit slightly larger then the keys channel) drill as straight as possible ( it should be somewhat self guiding cus all your doing is chewing the sides away and keep drilling the space untill you shine your light down there and theres no debris or tublers hangin there ( a shop vac comes in very handy for pulling small shavings that slid down the remaining portion of the key channel)
Once drilled out you should be able to turn the cylinder with a screwdriver
on some occasions when drilling it will actually jam a portion of the tumblers up there just drill it a few times more if they refuse to drop step up to one size larger on the drillbit and rehit the hole you just drilled
Once the cylinder is freed of the tumblers and it turns just turn the cylinder 1/4 way and depress the locking pin
heres a tip don't bother drilling just the pin, the ignition still won't slide out it has a secondary retaining ring that when you turn the key it aligns to the slots and allows the cylinder to slide out
First Picture: Shows what you will see down the keychannel/barrel of the ignition.. please note the one I used to demo has a trapdoor that snaps shut when the key is removed to keep crap and debris out, older styles don't have the trap door.. you will basically need to drill the outer edges of the key channel to remove all the tumblers
Second Picture: Shows the location of the release Peg/Pin that once turned a quarter way you depress to release the cylinder (the pin doesn't depress alot and will need a good push to release the cylinder... a little wobbling of the cylinder while the pin is depressed will help release the cylinder)
Third Picture: is a picture of the key in the ignition to show approx depth on how much to drill out
Fourth Picture: is another picture showing the approximate depth of what has to be drilled out
Fifth Picture : Shows the keyed retaining band/clip on the backs of the ignition cylinder