I believe 33" is the correct length. One thread I had read before was stating they was cutting a van column down 3" from 36". Someone has a definite answer on here though.
Here is another that is offered thru CCP on Ebay that isn't too bad of a price and will fit
http://www.ebay.com/itm/CHEVY-C10-TR...sories&vxp=mtr