certified roll cage

Well I called NHRA chassis tech guy tonight,and everything track tech guy said is wrong.track guy saidI needed a bar between " A " pillars and it couldn't be bent.NHRA guy says not needed with a stock fire wall. track guy says I need a X bar between rear bars going through rear seat NHRA guy says not needed if bars are 1 5/8". track guy says swing out bar has to go at 9.99 et, NHRA guy says it is ok to 8.50 et.