318 head porting for the average joe

The SSR is a vary finicky part of the port, without a flow bench you can't tell if your gaining or killing the port. That first pic, looks like you heading down that road.
Like a said before a 3 angle valve job and a good bowl blend does wonder on a stock head. Other then cleaning up the casting, i wouldn't go any farther.
One of my heads i worked that SSR and opened it up, widend it up and the flow when Down! and made horrible screeching sounds. stuck my velocity probe in the port and found vary High air speeds in the middle and a negative pressure at the PRP wall at the ssr.
In other word the the air was going over the ssr and my bad porting(I thought it looked GRATE!!) caused a low pressure that force the air back up the port. Them heads would have made less HP then a stock unmolested head.........Even though they would have flowed more air on the flow bench then a stock head.

Just be careful, it's Real Easy to get Greedy and shoot yourself in the foot. :thumbsup: