There's so many crap parts out there. I buy almost solely from Napa but even they're quality is questionable on they're lower end product line.yup.
kirby just went thru this with the 4 liter.
when you buy heads its important these days to pay close attention.
not that it applies here....
but..
lots of guys will do hydraulic roller conversions and get some aftermarket heads and pound the seats out of them. when you read the boxes on some they, will say flat tappet only, because of seat material...
pretty sure the shitty seats have been making thier way into the wrong applications.