[ZZZZZZ]

I just replaced my glaspack sidepipes with full length open sidepipes. How do I know if I have to rejet the carb. The motor is a 10:32.1 428 with the Edelbrock rpm package and a solid Comp cam with 605 lift. The carb is a Edelbrock 750 out of the box. I checked the plugs after about 100 miles on the new pipes and they had a light brown to whitish tint.