Inside Door Handles

[rspears]

So I have stock style exterior door handles as pictured, and I bought stock style inside handles from Speedway, also as pictured. Note the attachment on the inside handles is a simple screw into the shaft. However, the shaft on the outside handles is solid, not drilled & tapped. They also may be a bit long, once the door panels are in place. Is this common, and I just need to drill & tap the exterior handle shaft, or is there a better way to attack the inside handles?