Long block merc 5.0. This is the Chevy 305 small block. It ran when I pulled it out of my boat this summer, but it was making a rattle. Mechanic wanted to tear it down, I replaced with a 5.7 instead. Selling for core price. Has block, vortec heads, valve covers, oil pan, water pump, harmonic balancer. It does not have cracked block best I can tell.