First off 720 4x4 leaf springs and 2" blocks and you get about a 4" drop with out going through all that trouble,and second why would you want to switch to that light switch on the colum versus on the dash,now you have a hole to fill in,and if you want to spend time getting creative on a shroud to go around that,i would concentrate more on cutting down the steering colum about 3' if you have not already,If you want to go custom then go for it,but to me it does not seem worth all the trouble for it.
On another note its coming along real nice,what is your plan for a power plant?