[C320-list] prop replacement? used 150% headsail?

[wdoc1 at aol.com]

Feeling "the need for speed!"  I have a fixed 3-blade propeller. Considering replacing this with a folding or feathering prop to gain a little speed for casual Wed nite racing without sacrificing too much performance under power.
Also looking to purchase a used 150-155% headsail...no matches yet at Bacon Sails or on eBay.
Anyone have recommendations/observations?
Thank you,
Bill McConnellDiversion, 2000, #714