FoxJ, have a look at this picture from my 38 I think the frames and heights will be similar. These are stock spindles and at the end of the frame the height is about 12-13 inches. That's without the motor or full radiator etc.etc. Adding all the running gear, fluids and sheet metal will bring it down to approx. 9-10. If you used the extra 2 inch drop spindles, your truck will probably be hitting every bump in the road.
http://community.webshots.com/photo/26859003/41133100InrrlQ


John....38 Chevrolet Panel Delivery
http://community.webshots.com/user/tobytailford