Not sure with what's been done to the motor, without tearing it down. Car was fully restored in the states in 09 including the motor. Had a few previous owners since then. All I have is the cam card, some notes saying comp. 9:1. Mildly worked heads off late 80's truck. Cam upgrade. NOS 72 block. 650 Holley with vac secondaries. A833 with LSD 3.23.