I have an 83 Aspencade which had a stripped alternator shaft and bolt. After pulling the engine, replacing the bolt and shaft, cleaning up the starter clutch, I put it back together, changing the timing belts along the way. I had a fully charged battery, but when I hit the starter button, it turned over very hard and slowly. The starter also got very hot. I even tried a little starter fluid to try to get it to fire, but it just backfired a bit. It didn't do that before pulling the engine. Any ideas?