Headers aren't really bad! These were made by Ernie M (local guy) for John Burdine For a B body RB engine. John was generous to sell them. Six of the eight are almost a bolt-in and two need remade. I didnt check for plug access but it can't be bad? IDK And I won't know soon because I took that mock-up out last night to make room for the KB/440-1 install! I have to say I owning and handling the Predator stuff now makes me reevaluate (at this point in time/race season's is over) why I'm playing with the 'inferior' top-ends.