SUSPENSION SWAP?

[HAMMERDOWN]

I'M TRYING TO FIGURE OUT WHAT TO DO WITH MY 85 1/2 TON SWB 4X4 (MONEY PIT). I CURRENTLY HAVE: A 12 BOLT REAR & 10 BOLT FRONT END W/ 3.73'S, 350 W/ LESS THAN 20K MILES, 700R4 TRANNY (ALSO LESS THAN 20K MILES) & NP208 TRANSFER, 4" SUSP LIFT, 10X15 WHEELS, & 33X14.50 TIRES. WELL, FRONT END IS TORE UP AGAIN (REBUILT IN 96), BUSTED RING AND/OR PINION, BUT THE REAR IS STILL STRONG. SHOP SAYS MY LOWER BALL JOINTS ARE ALSO BAD & I'M LOOKING AT ABOUT $500 TO GET THE FRONT END RIGHT. VISUAL ON THE LOWER BALL JOINTS SHOW APPROX 1/16" SLACK. HERE'S MY OPTOINS: 1-FIX CURRENT FRONT END @$500. 2-I FOUND AN 82 3/4 TON 12 BOLT FRONT & REAR W/ 4.10'S @$700, BUT WILL REQUIRE NEW WHEELS (8 LUG) AND MOST LIKELY A CUSTOM DRIVE SHAFT. 3-FOUND SOME 1 TON 14 BOLTS W/ 3.73'S THAT ARE CHEAPER THAN THE 12 BOLT 4.10'S (ALSO 8 LUG & CUSTOM DRIVE SHAFT). I DON'T INTEND ON GOING ANY LARGER THAN 35" TIRES. HAS ANYONE OUT THERE SWAPPED FROM A 1/2 TON TO A 3/4 OR 1 TON SUSPENSION? WHAT OTHER MODS/REPLACEMENTS CAN I EXPECT? SHOULD I STICK W/ THE 3.73'S OR GO W/ THE 4.10'S?