breaking nose cones on starters

[cpegasus]

the truck has broken 2 nose cones now and I have tried many different shim combinations it sounds best with none but then it eats the starter it is a 77 K10 with I believe a 400 that's what it came with and it is externally balanced incase it matters it has a 4 speed with a 205 transfer case I'm just out of ideas the flywheel looks fine on a tooth by tooth inspection any ideas would be appreciated  

[roundeline]

cpegasus,

I can't offer any personal help, but I did run across this link that might be helpful.  

www.chevytalk.org/forums/Forum45/HTML/008319.html

I hope this helps.

Matt

[cpegasus]

thanks for the info if the new ring gear dosnt solve it there is a tip there that might
Carol