Blaster stuff

was wondering....is carb aftermarket right? if so srry im kinda lame at this whole stock and aftermarket stuff...if i ended up gettin aftermarket carb what else do i need since i got a stock carb now? would i need anything else upgraded to use it?
 
DO YOU STILL HAVE THE 34MM. IF SO, HOW MUCH & HOW SOON CAN YOU SHIP? I HAVE A DRAG RACE IN 3 WEEKS, AND IT WILL GO WELL WITH ONE OF MY STOCK BLASTERS.