489 Third member Build - update - Cant set back lash - Need advice

Yep yer right,you halfta do the very same thing to an 8.25 to get the (newer) aburn sure grips to fit into the housing. In the directions it even told you about how much to grind outta the housing. I havent ran across this yet in the 8.75 but had only ever put in power locks or re-vamped the o.e. cone style sure grip's.