Its hard to tell. The head is definitly GTE because of the side the water inlet is on for the coolant system. However with the distributor setup that would seem to push you toward the GE motor. Everything is so custom it would be impossible to really tell without knowing the car first hand. If you ever look at the Titan Supra I think it runs a similar distributor type setup. Kinda cool, I might have to try it myself . Would be an easy way to run a GTE head while maintaining the GE block and internals and still be able to bolt up off the shelf turbo kits.