Yes the integrated is prone to cracking Esp. if it get Over Heated. If you try porting it to clean it up. You will miss alot or could. Because the ports can't be cleaned up from both directions Like you can on a non integrated head. Some of the Heads also came as 2b carb.And Yes they will fit any of the chevy 6s 194,230,250,292
But could still end up with a head that doesn't flow very will (stock intake sys,Stock exhaust sys) Where as the Other Head You can Have a better flowing exhaust Duals (headers, Or stove Bolt) Your pick of Intake systems.
Hope this helps }[oooooo]
God doesn't like ugly.
