One of the keys to learning to port your own heads is to not take advice from people who admitedly cannot port heads or are afraid to. Its like taking advice on baseball from some one who cannot swing the bat. You got to swing the bat to get a hit.
You learn by doing. These are an excellent head to learn on. And if you do the whole port they will flow a good bit more than when you started.. You really cannot mess it up.
There are many good books on general porting and SBC heads specificely.
Just don't grind the (*&^ out of the floor of the port. This area just needs a clean up.
The port needs to be made taller and a bit wider. That valve guide boss needs to be thinned and streamlined so the
air can go around it. The push rod pinch needs to be opened up a bit too. The port opening at the flange does not need to be huge. felpro 1205 gasket size is just right.
These heads respond very well to generous complete hand porting and the larger 1.94 valve.
They will flow a lot more air when you are done than when you started.
This is not rocket science. And you don;t need a flow bench.
I have flow tested these heads after porting. The flow bench testing did not get the gain in flow...THE HAND PORTING DID.
Last edited by F-BIRD'88; 11-27-2012 at 08:06 AM.