Get option 3, Jegs brand adjustable distributor with wire harness, ignition box and coil. Hard to beat the bang for your buck aspect.
After re reading your post ...geez , you wanna rid a part because it doesn't look factory...lol
How about you keep the better msd box and stick it up under the dash onto the inner firewall then mount a dummy stock box with foe wiring to it. As for vac advance....sacrificing a great ignition system for a possible mile or 3 gain in mileage is a bad idea. Go buy a msd ready to run distributor of you wanna do that.
Otherwise I'll trade you an entire factory setup for your msd.... if that doenst sound like a fair trade, then the entire idea of the swap you're considering should sound just as poor a decision.