Shoulder Vs. Lap belts?

[muddpile]

Since I am upgrading most of the interior of my truck, I have been thinking about maybe upgrading the seatbelt system as well. I have the stock bench with stock grubby/broken white seat belts right now, but will be replacing them with 92ish chevy buckets and console. I will be buying new seat belts from Julianos, but my question is, what does everyone prefer with newer buckets, lap belts or shoulder? I figure since this will be my daily driver, safety should be a concern, but are the holes in the upper cab at a nice level to be comfortable and such? Thanks!