Tech Question!!!

[chopperdawg80]

Ok, Here is what i have, 71 C10 longbed, with a 350 punched out .040 0ver (a 383 stroker), now my problem is that mystarter is not meshing with my flywheel 100% of the time, it usually starts up on the first crank, but after that its like the starter is moving away from the flywheel, i have used 2 differant kinds of bolts( the cheap aftermarket ones form auto zone and stock starter bolts from another 350 i found in a junk yard) also i have used 2 differant starters one for a 350 and one for a 400. I have replaced one flywheel already and am trying like the devil not to have to replace a second one!! does anyone out there know what could prevent this, or what i have to do to get this engine to just crank over normally? any advice i can get would be greatly appreciated, thank you in advance for this!