yup. got some EQ "ready to run out of the box" heads that definitely weren't. on my wife's 360 Mag in a Durango (stock original engine as it came from the factory, with EQs to replace the factory cracked heads Only other deviation from "factory stock" was a 30-thou overbore) after running for break in in the home garage I went for maiden voyage. Within 4 freakin miles it stuck the #4 exhaust valve and kissed the piston. BRAND NEW HEADS! so I had to take them off and spend ANOTHER $200+ at the machine shop to basically have a valve job done, all of them were too tight. so my $700 heads (back in 2016, picked up right from EQ on a "will call" from their Chicago warehouse) became $900+ heads......