please help will these work

http://www.jegs.com/cgi-bin/ncommerce3/ExecMacro/headers/header_dsp.d2w/report?prmenbr=361&prrfnbr=8251&partnumb=520-2460&cartype=CHEVROLET+/+GMC+Camaro&vendor=GMC&header_type=Competition

will these headers fit i know its a long adress link but if its easier for u the part number is 520-2460 the foot notes say they work w/ angle plugs have a fitting for an oxygen sensor and if i add a zero in front when ordering offer air injection and also do i need to buy more connections for the smog pump or is that what the air injection is and one more thing what type of gaskets do you recomend

well id really like some help on this cause it would really suck to buy them and then not be able to put them on