Free Miner, don't have a 54 here to check against my 70, but my recollection is that guard screw hole spacing is not the same.
yes, my bad, the front guard screw on a M54 is in the recoil lug like a M98, and a M70 is of course behind the recoil lug. I've seen M54's with M70 bottom metal retro-fitted by drilling and tapping a hole in the proper location
They are otherwise dimensionally the same, I have dropped a pre-war M70 into a M54 stock and everything fits. Winchester and Wisner have the same part numbers for the magazine box and ejector and a couple other things.
