20" or 22", but you have to do some really major mods to go with the 24" & the 24" pricing is still quite expensive. You have to ask yourself what your plans for the truck are. Is it strictly for show or is it a driver that will see shows only on occasion. This should help you answer your question. On my truck I really wanted to go with 20", but after taking into consideration the roads and the fact that I use it alot to tow a large ski boat I whimped out and went with 18"...just an example of using logic to screw up a choice

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And, Dv8Customs, that thing looks great! It is going to be very cool when finished.