Hi guys I have a 90 Chevy 1 ton 4x4 fresh TBI 350 headers and duals with 3:73 gears it runs great but does not seem to have any power. Stamp on starting out is fine for heavy truck but on highway or crushing it just seems to get louder and doesn't really seem to go much. Is this what I should expect because my 98 vortec with with 200000 miles would kill it in race. I know it's not at all close to vortec levels but thought headers and duals would help it get closer.