The one block I had for aluminum rods was ground only in the area where it was needed. As I remember it was not that much. The grinding and smoothing went up into the cylinder about an 1" and arround on to the botton about 3/4" I don't remember how deep but 3/8" would be close. The rods were never touched. When I went to use the block for another engine I found it to be cracked up in one of the cylinders probably happened when the crank broke between # 4 and 5. I bought the engine with the car. The only component I have ever used was the injectors. Some day I'll see if the Racer Brown cam and the head works.


216.158 MPH 12-Port 302 GMC on 70% 171.0 MPH 302 stock head on gasoline 7 years later