Blah v8 swaps are getting way to common ( in no means am I saying they are no good) , With inline 6 turbo motors so cheap now and the swap kits making it easy, you could put a hurting on so many.
original auto miata with rb25det
add big turbo, fuel, clutch 100% full street car
The car ran for 3 seasons stock long block, no valve train mods nothing, only engine mod was a headgasket after 2nd season,
The past season They are still running mostly stock everything but pistons after they added nitrous. Engine never had any issues . Engines good for 600whp and trannys good for 700+ hp