The biggest question that you have to answer is if your model 70 winchester is a pre-64 or post 64 model 70.With that established you can order a set of bases for your rifle.Some times they are listed with the distance between holes on the top of the receiver.I just use a dial caliper to measure the holes center to center.You can still find some old time redfield bases on E-bay,or you can get the standard leupold bases.If you prefer the weaver still bases,they can be had also.Good luck in your project.
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