I've since made a few changes. Getting the modern wheels took a few parts...then a few more...then a few more. Here is a detailed list for any who want to do it:
Front:
-B4 inline steering blocks
-GT wide axels
-J Concepts Rulux Wheels
-bearings 3/16 x 3/8 (4) non-flanged
-Dirt Hawg tires
Rear
-B4 rear carriers (bored out to fit) (part #9584)
-3/16 x 3/8 bearings (4) non-flanged
-b4 rear axel (#9670)
-3/16 shims (thin allow ones)
-Wheel spacer (#9608B)
-3/16 lug nuts
-B4 drive pins
-J Concepts wheels
-Dirt Hawg tires
I had to move the shots in a bit on the lower arm to allow for enough clearance. The main issue with this setup is the dog bones are now too long. The B4 carriers make the rear wider (needed for the wheels to fit because of the offset....they are much closer to the body than most wheels). The dog bones were not too short...my local shop told me to use some fuel line. They cut me off a few inches and just handed it to me. I put about 2mm in each outdrive and axel and there is room for them to have some play, but they don't fall out. Its also soft enough that under full shock compression there is give as the dog bone press up against them.
After driving it a bit the stock motor got hot. REALLY hot. This was using a 13T pinion. Aperently the greater strain on the motor from the bigger and heavier wheels was too much...or its just a worn out motor. It was also pretty slow and lacked punch. So...picked up a 3000kv brushless kit from EZRun. Dropped that in there and wow...what a difference. I also replaced the spur gear with the 48p 81t Kimbrough (
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXS463) and put a 15T pinion on it. What a difference! Not only is it much faster accelerating, but the speed control is so much better. I was using my old Futaba from 25 years ago. This one allows me to control coasting resistance, braking, acceleration, and more. Driving it feels so much better. Being able to adjust the braking and coasting settings makes a huge difference in steering and overall control. That alone was with the $58. Top it off with a motor that really makes this move so much faster than stock and I'm a happy camper. Modern electronics are really worth it!
The 6 gear trans does not seem to mind the new motor. Gave it a good hard workout and it ran and sounded great. I've not opened it up, but it feels just as smooth as when I rebuilt it. I do have a few extra idler gears just in case!
I like the look of the modern wheels, and the difference in the modern ESC and motor is beyond night and day. Can't wait until my Lipo arrives tomorrow, then I get to really see how it runs on modern tech!
Thanks for all the help making decisions, speccing parts, and troubleshooting problems. Could not have done it without the great people on this site.