Like most of the "posts" I've done my front crank seal and used a speedy sleeve. If you have the pulley off you may as well put a sleeve on. Worth it in the long run. When you put the timing cover back on it is crucial that the pulley shaft line up perfectly with the cover/seal and in most cases it will. The hardest part (mentally) was putting the pulley back by driving it with a hammer and brass drift. After all that work I still had a leak and suspected the timing plate, which apparently does get warped or bent and leaks, albeit rarely. I thought that would be my next project but discovered that when I put the pan on I did not put enough silicone in the front half circle area and oil was leaking through a small groove. Don't skimp on the silicone. BTW I had no gaskets available at the time. Another thing I did was replace the slotted screws which hold the timing cover in place with hex head machine screws. If I ever suspected leakage from the cover it would be much easier to snug up the machine screws with a wrench than try to use a screwdriver.
