I have ported one of those befor! Just clean up the port, and radius all the edges from the pocket to the port. The biggest improvement is on the short turn. the head can get some work also. smooth out the blocks above the valves, and you can open up the head around the valves also/deshroud the valves. There is not alot of power found here but probably worth the little time it takes to do. We had the head milled, flat so the part of the chamber above the piston was flat. The problem here is you lose some of the flow between the valve area and the piston. You can releive the case or mill out a little from the head to pick flow back up, similar to how people used to hotrod the old flat head ford engines.