I'm having a heck of a time trying to calculate the middle driven gear shim for my 87 Big Bear 350. I've followed the service manual and gotten all my numbers... but when I do the calculations, I always end up with a negative value... I'm so friggin frustrated!

As per the manual:


My numbers:
d = 33
f = +08
c = 50.3
e = ???



I couldn't even figure out what my crankcase said... looked like gibberish! However, even if I took a guess at e, my answer is still negative because d seams like such a low value compared to the manual.