I doubt you'll be able to run in on a stock 4a ignition system, unless you work around it with an external ignition module or something silly.
I really don't have the time to be building other people shit just yet, however if i upgrade at any stage with anything, parts will be available for purchase
Tires are only 195's atm on the g5's which i think are 7" wide... but the f series diff will open up a new world of cheap rims and such.
got a few more updates ill post up later tonight