3rd Gen SBC (Small Block Chevy). You know, the Suburban, Corvette, GTO, Camaro, Firebird, SS Montecarlo (new ones), SS Trailblazer, G6 GTP, Silverado, Avalanche, Escalade etc motor.
Some of those are iron, some aluminum. The one in my Supra is an all aluminum LS6 (2002 Corvette Z06 Engine)...