I run an aluminum crank pulley on my Spitfire race engines, so the speedi-sleeves are pretty much a necessity. I've used them for years in many applications, and have never once had a problem. If you can get the crank pulley off with the engine in the car, they are a piece of cake to install. Many times you may have to undo the motor mounts and raise the front of the engine to do it, but it's still no big deal. They also have them for pinion yokes, and rear tranny seals. I have had some luck with shimming a timing cover seal to allow it to ride further back on the crank snout, on an unblemished area. Usually it only takes about .060 of shim to do the trick, provided you dont foul anything with the seal.
Jeff
[ 01-20-2004: Message edited by: Bugeye58 ]</p>