911/930 engine question

i have a '70 2.4L 911 engine and am building it to race, i would love to put a turbo(s) on the engine and was just wondering if 930 headers would fit on that '70 eng, and if they do, does anybody have a set of 930 headers to sell?....any info is appreciated, oh yeah...any suggestions on what i should put on the engine for extra h.p.? anything except new p's and c's, im putting web racing cams and an electronic ignition, it already has dual webers....thanx again