Well today was the day, and sittin in the garage right now is my new baby. Got that 454 pulled outta that burban, let the madness begin. Its a 4-bolt main!!!! /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif now for the questions. This thing has oval port heads, but on the side of the block, it has high performance stamped into it in a couple places. I pulled the casting number (what i can read of it, and its 160S(maybe a 5 not a S)445 ........... what is this engine?Specs? Also does it have a steel or cast crank in it? Im gonna go back out there and recheck the number tomorow but right now i am thoroughly beat, so is my dad, and my keyboard is gettin greasy so good night.