Custom Gearbox Without Automated Machining?

[Sam Skoglund]

My team does not have any access to a CNC, water jet, laser cutter, etc. The best tool we have to machine parts is a Bridgeport mill without DRO. I am wondering if anyone has experience making custom gearbox plates with limited automated machining capabilities like us. If we use a calipers to measure, and a center punch to mark the holes, is it possible to obtain center distances that will be accurate enough for the gears to mesh properly?