read:
http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=2;t=011182;p=1#000003

http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=2;t=011238;p=1#000003

http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=22;t=002711;p=1#000000

rear ends that fit
http://www.chevytrucks.org/tech/rear_ends.htm

why spend lots of money on having the rear end tubes cut and rewelded, buying new axles & ??? cause it's tooooo wide. there are many that you should only cut the old hangers off and weld your new hangers on to fit your truck!!!!! I had my gearing changed cause that equipment/parts are readily available.
disc brakes can be always be added if you plan on going THAT fast. the rear brakes on my stock HD 1977 burb rear are 2.75'' wide.
they stop pretty good.

my .02

Jim & Caroline
The highway is for gamblers, better use your good sense."
Gooday-that's my 1¢ answer due to the lousy economy ~ cause I ain't got - no . mo . doe
Every Shaver | Now Can Snore | Six More Minutes | Than Before ... | Half A Pound for Half a Dollar | Spread On Thin | Above the Collar || BURMA-SHAVE