596 casting or 308 casting for mild 360 4bbl
Here are some DIY porting results on a set of 596 castings. This was about a 3rd set of heads I ported, pleased with the results. Your are probably not going to go that extreme in terns of the port work though.
LIFT I E
0.100 67 57
0.150 99 79
0.200 130 104
0.250 162 125
0.300 189 140
0.350 215 152
0.400 235 160
0.450 253 167
0.500 262 172
0.550 261 175
0.600 248 177
The finished chambers/ports looked as follows:
I would assess the situation from the perspective of how much $$$ are you going to sink into either stock casting to make it perform? These days, that type of money will buy you a decent aftermarket iron head.
At the very least, consider optimizing your static CR to work with the heads and camshaft in particular. That will be the key to making good torque.
Here are some DIY porting results on a set of 596 castings. This was about a 3rd set of heads I ported, pleased with the results. Your are probably not going to go that extreme in terns of the port work though.
LIFT I E
0.100 67 57
0.150 99 79
0.200 130 104
0.250 162 125
0.300 189 140
0.350 215 152
0.400 235 160
0.450 253 167
0.500 262 172
0.550 261 175
0.600 248 177
The finished chambers/ports looked as follows:
I would assess the situation from the perspective of how much $$$ are you going to sink into either stock casting to make it perform? These days, that type of money will buy you a decent aftermarket iron head.
At the very least, consider optimizing your static CR to work with the heads and camshaft in particular. That will be the key to making good torque.