Actually I've got a 1955 straight grip 336sc in 35 Remington, which has what is obviously a factory drilled and tapped receiver. I don't have it scoped and don't intend to but I did order a new Leopold mount just to have one on hand. The holes line up and the included screws fit.
I've never cared for see-through mounts simply because I like to mount a scope as close to the receiver as possible. Many years ago I had a Remington 740 in 30-06 that had a set of Weaver tip-off mounts. They were hinged on one side and had a spring steel claw on the other, to ostensibly hold it tight in place once it locked. The selling point was that it allowed you to swing your scope to one side and use the irons if you wished. I could never get that rifle to shoot worth a damn and being a kid it never occurred to me to put a decent scope mount on it. It went down the road and to tell the truth I've never missed it.
Last edited by SargeMO; 05/30/21.