Hey guys I was wondering if it would be worth it to upgrade my stock carb on my Z for say a FCR 39. Im a little groggy on how a bigger carb produces more horsepower and if so how much more hp am i going to see out of this. Ive been looking around and have seen them go for around 200 bucks so I am interested. Also, im curious if PJ1 frame paint is something that can be sprayed over the existing coat or do I need to sand paper off the old color for the new red paint that I have ordered. Thanks.