The one I have responded well to fire lapping using a kit from Brownells.I think I have had 4 760s .I have wanted a basket weave one talking stock and forearm .I look for them on gunbroker .I don't think the ones I have had showed 1moa potential .I still always want another though.
I wouldn't be afraid of letting a competent gunsmith drill 4 holes in the top of the receiver. Unless your version is some super special one I wouldn't be concerned. The value in the older ones is in their utility. They made a zillion of them.I just purchased one recently. It’s in 30.06 and is the same year as yours, I believe. However, mine is not drilled and tapped for a scope. Was yours done by the factory? I’d love to mount a scope on mine but I’d hate to destroy the originality of it