stock rear suspension mod

[gmonde]

going to the good old nhra rule book states,that rear trailing arms may be replaced with nhra accepted ones(is there a list of accepted ones some ware?)and it also states that heim joints are acceptable on the upper trailing arms,can the guys running rear coil spring cars chime in,are the nhra techs picky or strict on rear fabricated parts,the last time i opened up the jegs or summit catalogs they dont list to many after market parts for a 70 rebel machine but the rear suspension does mirror the 69,70,71 gm's(same bushings) thanks gmonde