I used to have a highly respected and big-name Mopar guy do my engines: 1st one was great. 2nd one grenaded after 3 easy break-in passes. Post-mortem was shocking, stuff like valve reliefs machined through the deck of the pistons leaving a hole in each one approx .125 x .180...
Never got a straight answer from him, but his kid does well in Comp Eliminator, so maybe his gardener stepped in on my deal.
Went with another builder after that based on recommendations of fellow racers; twice the engine guy at abut 70% the cost, and as bulletproof as they come.