I recently picked up a very early Dakota 76 in .375H&H. They are a very nice rifle and mine feeds and shoots very well. I have heard that they went through a period where the accuracy could be hit or miss; I think this was when they were using Lothar Walther barrels. The actions are nice but they are not cheap, you might be able to build your whole rifle for the cost of one. I would second the idea of finding a pre-'64 Model 70 action and working from there. You should be able to round one up for under $750.