i have an 87' IROC with the LB9 5speed combo. it is a G92 car with the 3.45 gears. im starting to do minor boltons and was looking at Hedman long tube headers on www.summitracing.com. however, they have a number of part #s that claim to apparently fit my application. my questions are:

1) do the 87' TPI 305 heads have a "D" shaped exhaust port? i know the aluminum Vette heads had this, but i am unsure whether the iron fbody heads had this as well

2) if the header description says it fits heads with angle plugs, will they work ONLY with angle plug heads or are they simply stating theres enough clearance for both angle as well as straight plug setups?

3) if anyone knows, what is the correct hedman part # for my car WITHOUT A.I.R. hookups?

thanks in advance

 

found all the info i needed. thanks for all your help!