I think The Joe Darlington drop brackets were 1-1/2" drop? I have them installed (Yes LOTS to take apart)
If you guys were fabbing up more I would go another 1/2"-1" there is still lots of clearance under the axle with larger tires. With my 3-1/2" lift I still tore many boots, however those mag-tech boots have worked really well for me so far. No tears yet (6 months?) fingers crossed they hold.
2001 Ironman Daily Driver... 3.5" suspension lift (OME912 springs and 1" spring spacer), ball joint flip, 1.5" front diff. drop, 33"x12.5 TrXus MT, 16x10 Eagle Alloy rims, Interceptor, PV muffler, K&N air filter, Alpine Supercharger, Bilstein shocks, and some trimming.
2000 Ironman Project LS-1 VX... very slow progress but someday....... ohhhhh someday......