Don't know the exact number of LH M70's in .375 H&H,but,it was not many.
Probably worth more than a grand as there are few LH M70's in .375 H&H.
As far as turning the M 70 into a .416 Rigby,it can be done,but it will not be easy or cheap. Better off getting a CZ 550 .416 Rigby.
Last edited by elkhunternm; 03/18/17.