Hello Wayne,
The Browning 78s, except for the .45/70, had a pistol grip stock and were made in the some of the calibers you mentioned. If you are set on using iron sights the Williams Fool Proof 1885 will fit receiver scope holes on both the 78 and 85 models. However the 78s had no front sight.
If you are going to use a scope a 78 might be the solution.
I don't know if you have used one of the straight grips 85s but the straight grip feels better than you might think. If you want to meet at ARC you are welcome to shoot my 85.
Ed