STOP STOP STOP. there is no need to re-engineer these trucks front end too much. Do you want to switch to a 5 bolt pattern for the wheels? if so the easiest thing to do is to find a 73-87 C10 pick up or 73-91 R10 suburban.
http://67-72chevytrucks.com/vboard/s...d.php?t=444823
once you have found one of those you will want the whole front end (suspension, steering, everything)
The General did not change very much over the years. you can take the whole crossmember with suspension and steering and transfer it to your truck. It will gain rubber control arm bushings, disk brakes, power steering, all the goodies.
you will need a bracket for the steering box to mount properly to the frame, if you get the booster,master cylinder and brake proportioning valve of the donor you will need a bracket to mount it to the firewall.
the best way to do the swap is find someone that will sawzall a frame right behind the shock mounts and take it home. transfer parts, good to go.
check out the FAQ's on the 67-72 boards also there is a ton of good info about these mods, and the 62-66 are as I said basicly the same under the skin.
also the FAQ in the 60-66 boards.
http://67-72chevytrucks.com/vboard/s...d.php?t=450021
Also check here for lots of answers
http://67-72chevytrucks.com/vboard/f...splay.php?f=92
Enjoy lots of fun ya got there.