forget the saddle mount. most of them you have to tighten the bolts to stop movement and then you bind the trigger. there is plenty of room and metal thickness on the receiver behind the barrel extension to drill and tap for a scope mount. I have standardized using a weaver #62 plate. it is for the older Remington 760 so then any such mount will fit if you dislike weaver.
That... Just make sure the forward-most hole is drilled just aft of the barrel extension.. And take time to ensure the receiver's set up level and the holes are drilled at exactly TDC..
The longer I think about this the more I lean to the cantilevered one piece barrel and scope base, and I'll bet that is what I end up with.
Those work fine too - but at a mucho steeper price..
