The Win 70 is not a great choice for a custom build right now because they have become so expensive (a good price for a standard boltface LH 70 is $1000.) If for some reason the price drops, then they might become feasible again. I think they are a great hunting action, but not worth a grand for a donor.
YAWN. MRC actions cover that "void." MSRP on CM actions is $745 plus shipping and MSRP on SS versions is $809 plus shipping. They are currently one to two weeks out on these and both are available in "short" and long versions. Ruger Model 77 MK IIs and Model 77 Hawkeyes are the next most feasible route into a left-handed CRF action.
