Tomorrow I pick-up my Pedersoli Rolling Block in 45-70, plan is to have it re-bored to 50-90 among other customizing.
First question is who to have do the re-bore? Internet has several 'smiths advertised......any experiences? Opinions?
Thanks

I think it is a slightly crazy idea but it's your gun, your life, your money.

That said, I believe .50-90s in a Ped may have issues clearing the hammer's nose or the top corner of the block. You may have to do additional work to get the bullet in the bore. Might be mistaken but do your homework before you get carried away.

Brent

Yes I am aware the overall length/cartridge angle ARE a concern, hoping to find a gunsmith familiar with issue.

google up Lee Shaver

Lee Shaver's website:
http://stores.intuitwebsites.com/hstrial-LeeShaverGuns/StoreFront.bok

Might you be better off getting a new barrel fitted in 50-90 rather than a re-bore? Your gun, your vision . . . therefore, it's your decision.

New barrel is a possibility, cost will determine.
Looking for a hunter, have single shots in 30/32/38/40/45 calibers already of varying types and manufactures

You have been given some good advice. Stay away from a 50-90 in a Pedersoli roller. At best, you won't like it. At worst, you are in the process of spending a lot of money to cobble up a train wreck waiting to happen.

Longway around the barn to get to the house.... Would most likely be better just to get a 50-90 built gun to start with, unless you're getting that roller for 50$...
Get ahold of Crossfire Oops here, he can tell you what all will need to happen besides a different extractor.Then if he doesn't want to tackle the job you'ld probably be smart to get ahold of Dave Casey or Wyoming Armory up in Cody and see if either of them want to take it on.

What makes you say that, the loading angle? Change/re-fit extractor cant I use a 50-70 extractor? Lotsa 50-70's out there really wanted something a little different and no intention of max-loads.

I have shot a friend's 50-140 Rolling Block in the past, so it can be and has been done. I honestly can't recall the modifications he needed to do to be able to load that cigar into the bore, though. Lee Shaver, or any other BPCR familiar gunsmith would be able to tell you.