I've messed with a few win70s. Seems like all of them are 1"x16", both push feed annd CRF. except the more recent wsm and ultra mags. When I say recent id say the last 10-12years. They did this to beef up the tenon around the chamber because they were running into over size chamber issues.
You might be able to look into one of the front scope mount screw holes to see if the barrel tenon is a fine or corse thread.
And for what it's worth, I've seen both push and crf of both thread patterns.