I use a 3/8" dovetail base on all of my rifles.
It allows me to use scope rings or Anschutz sights.
I prefer high scope bases so your head is always upright when sighting through the scope.
Also I make the base high enough so my head is upright when I look through the iron sights as well.
Looking through your sights at an angle does not always give you the correct POA.

If the barrel is not tapered; the front and back dovetails the same height will work.
Even if the barrel is tapered the same height dovetails works well and compensates for trajectory a bit better.
Either way you should easily have adjustments out to 200 yards regardless of scope or iron sights used.
The bottom picture of the Yost has higher dovetails to accommodate the wider 50 MM objective lens on the scope; but the same height front dovetail still allows it to use Anschutz sights.

Here is the way I set up  my CPA Pope Style Schuetzen sights Iron , Scope, Rimfire & CF Barrels. Was fortunate to own a Anschutz 54 Super Match .22 with adjustable buttplate cheek piece and palm rest. Basic dimensions LOP comb height buttplate position palm rest etc,used to stock the CPA

Scope first on the CF barrel, set up on wood risers with zip ties to obtain head position I wanted no firing just feeling the position out. Then actual blocks same height as the wood trial blocks. Scope zeroed at 200 yards standard 32/40 load it was well within the Unertl’s range. Testes it Gallery 50’ squib too.

Rimfire barrel taper was different, this to obtain same weights and balance CF to RF.  Back to wood, blocks on the octagon no taper, same height blocks as the CF barrel.
Unertl zeroed fine. 100 or 50’

Next installed the tang sight, raised it to same height center of the arpeture - center of the Unterl Occular lens.

CF barrel on the rifle. Tang sight height adjustment fixed. Two zip ties on the muzzle over the front dovetail. Opposing directions wrapped them with thread & nail polish to form a tall plastic post front sight.

Back to 200 yards zeroed by clipping the plastic down. Same idea as filing a muzzle loaders blade to zero with a fixed barrel sight rear. Measured the height and recorded 

Last same method with the Rimfire barrel, recoding the required height.

Sent the heights to Mike Stevens (1996 think it was before he passed ) who supplied all the sighting equipment except the Unertl. Tje two front barrel blocks = different heights RF to CF & one spirit level windage adjustable front. Fit either barrel.

No difference in head position however the rifle was configured . I guess you could do it with calculations but actual firing with temporary front sight is quick and foolproof. Trial does not have to mean error. 

Final chapter this story, we had great offhand Schuetzen matches close to home. Now little offhand competition for the rifle within 1000 miles, took it apart last year sold the Pope stock Palm rest and all. Restocked it to a Sporter and shooting it in club matches that don’t allow Schuetzens. Same match my other CPA is used for,.

Boats 

With sight line set for my 12x Unertl the MVA short staff Schuetzen tang was at near maximum height to zero the rifle at at 200 yards. Larger Unertl was a poor fit cou0ke ways. Mostly weight,

Back them in shot a lot of modern rifle high power and rimfire silhouette. 10lb 2oz weight rule no hook plate or palm rest. Both used 6.5x20 Leupold scopes always set on 20. The CPA Schuetzen at nearly 14 lbs was a delight to shoot by comparison. Old timers that set up high comb Schuetzens had the optional offhand rifle.

The remodeled flat plate CPA is doing well in club matches but I miss the hook buttplate. Tried several methods none very good. Rimfire barrel back at CPA now for a 4 oz weight reduction. If it works will do the same to CF 

Boats