Diesel suffering...

Well... my 1982 300SD Turbo.. is driving me nutz.. Since about 180K its had trouble starting in cold weather.. but now its gone to far.. this past winter I would sit and crank.. on an avrage of 10 min. till it warms up and starts.. even so I have the thickest could of smoke that plooms over my neighbors house.. ( im sure they love it) well recently the weather is warmer but im still having the same problems...The glow plugs are new.. and i guess im running the starter soo much that its starting to go bad.. somtimes it just whines.. and after a couple of trys it gets back to cranking.....any ideas? where should i start is my motor bad.. i have ~240K on the Odo... never had any engine work done.. im running Delo...and occasionaly redline..
Heres whats happining in a nutshell
1. Engine wont start in ~60 degree weather ( California Winter )
2. Starts after 10 min of cranking.
3. Runs fine till left it sits to the next morning.
So any ideas?
Thanks.. i realy dont wana dump my diesel.. or get a rebuild...