You could use blocks too, for lifting such a small amount. However, the problem is that you'll likely need to change your steering linkage and change the driveshaft/pinion angles as well to get it to steer/handle properly, and not have massive vibrations.

If your truck is fairly stock, you might want to convert to open drive.


1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

My 46 GMC on Photobucket