The motor is a stage II off center block. 3.59 stroke BMS crank, Carrillo rods, JE pistons. I think it puts the cui around 272 area. GN1 R heads ported, 224/224 Hydraulic roller. GTQ 71 turbo and 200r4 Trans. The car is running on an old school gen6 Accel DFI but he also has the XFI ready to go. It may have been installed already. It has the CTS V rear end and lot of custom work like the IC down pipe, exhaust, the accessory bracket and so on. The car is a beast even though it's not turned up yet. The motor is capable of making 700-800 RWHP with the current setup. He is just waiting for a dyno tune.
HTH
Prasad