new throttle body worth it ?

ive got a 98 DX with intake, header, exhaust, and a cam gear advanced two degrees and the last time i ran at the track i ran a mid 16 but the track was shitty and i didn't have on the header or the cam gear...ive been looking at some different copanies that make new throttle bodies and i was wondering if it would be in my best interest to get a new throttle body (bigger) or not...if i do does anyone know what size i can go to and who i should buy through ? Also, will this help improve my time ? thanks guys.