so the thread title says wiring and tires decisions...
are you still deciding on those?
I can recommend the ez-wiring 21 kit.. but I will emphasis... but the color coded kit. I bought all black thinking the wires say oil temp every 12" but the problem was all manuals or old timers say the light green goes too.... UGHHH THEY ARE ALL BLACK!!!!!!!!!!!
all in all though I love my setup.. I even cut the wires and put them through the factory harness....
tool, connectors and harness total ran me around $200ish i believe...
and it fits the stock GM block thus why i connected back through my oem harness...
see more here
http://www.supermotors.net/mygarage/content.php?id=8011&sID=66401