You'd be crazy to get rid of it for just a flange swap, that's a good rear diff. with low miles, if you can do a air filter change you can do this job & set preload, but that's just my opinion.
I actually just snugged it on to what felt right mainly to keep it from leaking, I think the instructions I sent in the box may have the preload spec, it does show procedure. If you need the spec for that lmk & I'll find out for you ?
Well I have sold a lot of parts & even you have bought other parts from me & this is the first issue I have had, Was not meant to mislead that's why I posted auto or manual & flange deference.
If you look at my post I was NOT selling as a auto rear diff. , I stated it would work in auto or manual car that the only difference is the flange ! When you texted my about price you did not say what you were putting it in or ask any questions about it except for the price & that you wanted...
PC pulley
The Procharger pulley is the pulley that goes on Harmonic balancer , & I have the stock Harmonic balancer it bolts to very low miles in perfect shape, make me an offer ? would like to sell both together.