Junkyard 360 LA Head Porting Questions

Yeah, that is a more realistic number to go for, considering it is only a 360 and seeing as it could possibly come out of a durango. I just like the idea of a hot street motor to wipe my friends chevy's off the map with. (they are starting to brag about how much better chevy's run than mopar's.)
You should be able to easily squeeze 400+ HP out of a 360.