i had 1.25" spindle spacers in front, plus the DJM, plus "stock height" sitting sic coils. they were the from the FIRST batch of stock height coils made so they ended up settling lower than stock (stock XR height).
in the rear i had the 4" block and my stock leafs de-arched 2" with the DJM notch. I had NO BOTTOMING OUT ISSUES whatsoever. if you were to want to do the same thing you'd have to just de-arch your rear leaf springs 1" because your's are already de-arched 1" from factory. i've had some people tell me that by doing that you weaken the spring, which is probably true to an extent but if it's done right you won't have issues. i actually brought them to a place where they work on semi trucks and had them do them by heating them up and flattening them out the 2" i wanted, worked out awesome and only cost me $100.
i used my truck to haul shit all the time. i have had a whole pallet worth or laminate flooring in the bed (heavy as fukk) and moved myself and 2 roommates with a ton of shit a couple times and the truck took it like a champ.
don't listen to those haters about alignment. camber is sexy. i drove with it for 2 years at -3 and only had it aligned right after i dropped it. it wouldn't go into factory specs so i told the guy to just make both sides even and correct my toe; never got another alignment until i went back to stock because they're to damn expensive. i also only rotated my tires ONCE (yes lazy) and had no unusual tire wear (Nitto NT555's).
i wish i had some pics of my truck right before i tore it apart. it was SLAMMED and i loved it till the day i de-modded it. going back though i'd just bag it. i spent a lotta money on my suspension over the years and should have just bagged it from the beginning.
I have a Scion xB now (1st gen FTMFW) and have my bags on order. it'll be nice to be able to raise it over ridiculous speed bumps/gutters and my steep driveway . static was titties though, i dragged the X-brace everywhere and was proud of it.
EDIT: i never had any driveshaft issues. ever.