Be aware that many 7-08 factory takeoff barrels have a 1-11 twist that may or may not stabilize 140 grain bullets. That represents probably 75% or more of the factory ammo out there. My 7-08 would do no better than 5-6" at 100 yds with the 140's, and I tried a great many of them.
I'd highly recommend an aftermarket barrel. Apache, Northland, and McGowen outlet would all be good choices.