Remington Society

There was a guy selling one of these online. Ever since I first saw it, I really want one. I didn't buy the one online because I'm a lefty. What do I have to buy as a doner rifle and what parts to go with it in order to build something like this left handed? The forward trigger and carbine length is...

I'm working with a guy over the phone on a Rem 700 that's had the barrel replaced. He knows nothing about guns, and can't even tell me if it's short or long action. I have the serial number only. Can anyone tell me what caliber it was originally? - Remington model 700LH ser B 6840480 Thanks in advan...