magnum head porting / pushrod pinch area / etc
I am going to use the 360. Since I am going to keep the truck for a while, I decided take the time to regasket the 360 and use the heads from the 318 that are good heads, plus port the intake.
Here are some head images:
The valve guide boss, is HUGE. Some definate improvements can be made here.
Also note the casting. They machined down in the bowl to install the valve seat but the rest is terrible. Monster angles, not a nice flow path.
Incredibly narrow intake runners
huge valve guide boss
step from valve guide to port
Valve stem seal not doing it's job....major flow restrictions.