leave your stock intakes on and plug the holes with 3/8 IPS plugs, 2 hose clamps, and 1211... Crossover is not needed.
mod your stock timing plate
unless you are hell bent on different compression the stock head is fine. The "cool" part of cool head is virtually useless in a stock trim bike.
Buy a puller
Look on here for a COMPLETE used +4 arm.
OK, sure, buy the reeds and pancake