please dont ever buy a ebay turbo kit. my buddy bought one and has it on a crx that he dragged. it lasted 47 miles till the turbo blew and the fins got sucked through the intercooler. youre best bet is to stroke it, or like said before, drop in a 5.9L.
definitely check out thespeedfreaks.net for some wicked fast ZJs. many of those guys are running 408 strokers and/or blowers.
'98 ZJ on 37s and tons
'02 Chevy 2500HD 8.1