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Super porting factory castings for aftermarket power.

In this, PowerTec 10 episode 31 DV goes into great detail on how to apply current hi-tech porting to early Chevy heads such as the 186, 049, 882, 041, etc, .In this video we look at just how m,uch power can be had from an early 186 casting. yes the casting is old tech but you will be amazed at what can be done by applying the lasted head porting tech. The motor shown in the heading shot produced 562 hp and 468 lbs-ft on a 11/1 CR. What was saved by doing the porting on a factory casting bought the intake, carb and camshaft which in this case was a 300 degree solid flat tappet from Howards cams