Brown & Sharpe Tilting Machine Vice

[Toolmaker51]

Tilt Vise; You'll do fine drilling, drilling thrust being vertical doesn't tax the fit between body and trunnions. As noted by dalee100 some combo vises, are mysteriously difficult when milling. Combo vises were important before numerical control and more developed methods generating compound angles. You couldn't build many kinds of tooling without them.
I still like tilt vises simply that related surfaces can be completed so easily. Tilting the head of a mill is tedious to get 'in' the work envelope and available axis travel. The used Yuasa combo vise I have, was low cost and completely satisfactory, doubting it being swiveled a dozen times in 25 or 30 years. Now, the swivel of a standard flat milling vise is a different story. If you plan cuts toward the stationary jaw no issues will arise.
For tilt vises, been tempted locating and boring pins into the sides for sine measuring. There is no need of 3" 5" or an even distance, just calculate accordingly.