the builder of the motor is unknown, but it looks to be like an extemely well done job. i did not check the compression on the car when i got it, but it is a brand new build, so i know the compresion is fine. the crank has beeb turned, and it has arp headstuds, as well as crower rod bolts. the motor looks to have extremely low mles. like i said there was still moly lube on the rod bolts. you really have to look at this in person. it looks absolutely beautiful.