[*] Drop-in switch/relay/whatever for TOD conversion to Full-Time 4wd.
[*] Isuzu t-case pinion brake system (about to tackle this one on my own...) to deal with the SOA/extend your parking brake lines problem
[*] AMEN! to the alternator relocation bracket
[*] Front diff drop brackets for IFS to deal with increased CV angles

That's all I can think of for now...