I've had my 85 K10 dd apart for almost 4 months now, I've been waiting on my engine for two months. Wednesday after work I finally got the engine home, didn't have time to do anything. Thursday night after searching in my shop I found my flywheel outside my shop in need of a resurfacing. My 85 had a single piece rearmain 305 when I got it, that flywheel I need to find for my new 350. So tonight I got home with the flywheel thinking I was set. I knew I had a pilot bearing sitting in my tool box from a past project and it won't fit!. Whats the deal, I want this 350 in there! I miss driving my truck and I hate seeing it in pieces in my shop!