1. This sounds like a valuable, repairable,and historic mopar part.
2. To be blunt, your FG repair knowledge apperas is not yet up to the task to undertake this repair with without the high risk IMO of a non reversible failure.
3. You need to take some baby learning steps first.
4. FG can be very rewarding,and full of costly surprises.
5. I am not going to participate further as I see a potential train wreck
6. Sorry if my succinctness is not what you wanted to hear..

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.