21st Century Tri-Power 507 HorsePower Engine - Pontiac Tech High Performance Pontiac Magazine By Don Keefe The 449ci Pontiac V-8 used in the Penfound Design Sabertooth '64 GTO is actually based on the Goat's original 389. The traditional Tri-Power Pontiac V-8 combination retains the GTO's mystique, but is updated and refined formodern ... |