Never installed Black Jack 14-16 gauge long tube headers for 1977 , 1978, 1979 351M/400 5.8 6.6 L F100 , F150 F250 RWD truck. Been hanging on my garage rafter for 20 years. Paint is scuffed up from handling before I got them. Intended project never happened.
NEW header gaskets include ( 2 sets) and a Fel-Pro KS 2308 Head gasket set