Hi - RCX suspension lift

[Ricardo3853]

Anybody have a 6” RCX suspension lift plus 3” Body lift?
I’m running 20/12.50/35 with 3.73 gears
Do you guys have any mods made to the front differential to make the lift work? I noticed my rcx lift has some shavings done to the front differential. 2004 Chevy avalanche Z71 4x4

 

[SRFNSNO]

I have been running Fab-Ten: lift on my 02 since 2004. it is not simple to revers had to do some grinding .
I run 35's but had stock 410 granddad a wile back now run 456