Small Block Distributor Recommendation

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.