O.K. Splitter, here's my suggestion. I bailed off into this myself with very minimal knowledge of the project , but by researching here's what i did. Right or wrong my 318 J headed screamer speaks for itself. Dont have a clue what #'s it flows but does a damn good job of getting down the road in a hurry. Try this for starters untill you get good or want to dive deeper. Get you some prusian blue dye and take a set of gaskets, both intake and exhaust. Line em up with the bolts on the correct side after painting the surface with the blue stuff and scribe the outline of the gasket on both surfaces with the proper gasket. You will see the amount of metal beyond the gasket that is obstructing the flow. Cut only to the line you scribed then only cut at a bevel into the port about 1/4". Take then and merely take out any rough casting marks that you can see that are obvious then smooth out the remainder of the normal casting marks with your grinder. Keep in mind that you can get em too smooth as the proper turbulents can and will have a positive effect in the mixture process. Get you some long shaft cutters and a good air die grinder and wear gloves and safety glasses or goggles. You can do it and will be glad you tried. Practice on aset of junk heads if you want first to get the feel of it all. Good luck. Dont tell me i cant do it...
Small Block
