EQ heads question

I bought mine bare from Eric Haugland of enginequest in Las Vegas. From what I understood he has the license or something to import/sell them & he gave me a discount after that crook Ben Gorman of "promax' in Indianapolis sold me a set of chinese knockoffs claiming they were EQ's & I got the pics/paperwork to prove it. The good ones from Eric had a sheet inside from Australia regarding recommended valve guide clearance the EQ foundry was recommending. Eric is a good guy to deal with. 1-800-426-8771 ext 207