360 head trip

I imagine the ssr is the short=side radius, ill assume that it is the short side going into the bowl from the floor of the port. sometimes know as the waterfall. I used to do some porting back in the day for a guy down in fl. Some tricks; widen the waterfall and have it very consistantly smoothed radius. Also, do not concentrate on the pushrod side of the valve guide boss too much. the other side produces swirl and turbulence and if you make each side, similar flowed troughs, they somewhat cancel each other out. widen the pushrod pinch as much as possible or actually install copper tubes in the guide holes and port the pinch 'til they expose the copper, stop there. (expoxie tubes in place). raise port opening as much as practible. shorten guide boss a bunch but leave the "tail" intact. 11/32 stem chevy valves, at .100 over length at exactly 2.00 diameter (1.94 work good in a 318 bore). pocket of bowl opening should be at 1.80- max diameter min. 1.75
with 2" valve. 3 angle valve jos with 45 degree seats. 5 angle if you can afford it.
later 360 heads have one "bad port" that you cannot make to match the others due to a bolt location creating a different shape to accomadate it. cant remember the earlier's X or J 'd design on this. as a rule of thumb with the small block, the bigger you go the better it will flow (within reason and keeping a few exceptions in mind).
you can get rid of the valve cover bolt boss that protrudes onto the port opening as long as you fill it up after (epoxy etc) and remember to use short bolts in that location.