Did you contact jcunclejoe like I told you? He can help you with all of these questions, and take you out to shoot steel animals at the range.
Bowen rear sight has better adjustment and is repeatable.
Belt Mountain pin will help with lockup, if your pin or cylinder not fitting properly. If you get lucky and get a gun with good fit, no need to waste the $$ on another pin.
I have probably 10 or more blackhawks and super blackhawks. I have 0 Wolff springs. Didn't need them. I do know of some folks that changed their hammer springs to a lighter ones to reduce movement caused by falling hammer. That was for their cowboy action guns. If not shooting cowboy action, one handed, from horse, you probably wont need them either.
I have modified the factory trigger return spring. That along with polishing mentioned below make for a very nice/crisp trigger.
You will need the internal polishing. You are removing burrs and marks left from the machining process. You can also remove metal to reduce trigger creep, but this is best left to an expert.
My super Blackhawk has the 10" barrel. I went to the sight blade made for the 45 LC because it was a little taller. My gun was shooting high and this taller blade let me aim 6 o'clock rather than having to guestimate amount to hold under to keep from shooting over everything.
Can't answer question about the cylinder throats until you get the gun. There are several different opinions as to what you should have. The type of bullets you shoot will have a bearing. Best thing to do is confirm they are all the same. If not the same, you will likely have different point of impact upon firing the different chambers.
Not saying what to do or what not to do. Just giving you more info to think about. No need to spend money on things you don't need or may not help when you could use it to start reloading or buying ammo to go out and shoot the gun.
Have fun and stay safe.
Steve
