is your 65 leaf springs or coil?
If coil, you know you will have to convert the 76 rearend to coil, right?
I did mine with dropped 2.5" spindle with 1.5" dropped springs on front and air bags on the rear with an adj panhard bar, rear shock re-locator kit. I did the bags because I may want to tow some day.
Oh btw, if you havent already, replace all the bushings and such when your doing the drop, makes for a more satisfying result when your done.
Most suspension retailers will tell you 5" is about as low as you want to go without the notch. The bags will give you about 3-5" drop or so.
Last edited by Clyde65; 07/13/2011 8:55 PM.