Hey - what about us guys who go the shorter barrel route, huh??? If you want a long barrel then leave that Blackhawk as it is and learn to shoot and carry that long barrel. I did that for a while and went from a 7.5" Super Blackhawk 44 mag to a 6.5" then a 4" S&W M29. I got tired of carrying long barrelled revolvers that wore holes in my hip and went with the shorter barrelled version, finding it much more comfortable to carry and just as accurate to shoot.
I believe that if I ever found another Super Blackhawk that I wanted I would probably send it out and have the barrel shortened to 4-4.5" - would make a excellent carry gun for field work. I sight my 4" M29 to hit poa at 50m as I do not usually either have a longer shot that presents itself or a clear enough sight picture for a longer shot, but knowing the drop on the load I use I am confident that I can properly place the bullet out to 100 if needed.
You didn't say anything about scoping it so I assume your eyes are good enough for open sights. You may recall that most police revolvers wore a 4" barrel, as it was found that for the average man (sorry ladies), the sight radius on a 4" revolver presented the best sight picture. You may also recall that both longer and shorter barrels tend to exaggerate the shooter's variations. Just a thought.......