Hold on hold on, back it up a minute. How long is a 2WD C4 output shaft? Reason I ask is, I have a 2WD C4 to go behind my 4.0, and have a D300 to go behind that... but if I could shorten/respline the C4 output to 25 spline, use my 1350 reduction box and my D300 with 4:1 low range...