by "index the torsion bars" you mean pulling the torsion's out of the stock keys and rotating them to the next "slot" more/less, right?
you could solid axle the front with some springs and lift the rear high as you want...lil more fab work but you could get whatever size you want under there
build long travel a arms instead of the straight axle. with coilovers. that'd be super bitchin!!! u could go as high as u want!!!
throw the affordability out the window tho lol coilovers are spendy