I don't build my own engines for the sole reason that 1 made 786 and the other 976 and those that understand things realize that when you start making power N/A that everything has to be spot on clearances wise and parts selection/assembly wise or you have issues so I would rather stick to what I do that makes me multi six digits a year and then pay an expert or experts to do those things. If i was building worn out junk that I sourced the used parts at a swap meet and knowing going in that it was a very basic run of mill type street/strip build then yes at that point I would do my own.