Invert the handle bars. This will give you a lower profile in the wind.
Loose the front reflector. It's like a billboard. Too much drag.
Mill the thickness down on the pedals. Drag and weight reduction.
Remove reflectors from spokes. This is a *****in blacked out dangerous ride (save the reflectors for some Nancy boy or a peroid correct restoration).
Add a playing card to hit the spokes. I would suggest a face card. Just the noise alone is worth a tenth in the quarter. Vintage wood clothes pins are faster than the new plastic ones.
Oh wait. I just noticed the seat....... uhhh you aint goin nowhere fast if you need a seat that big.