That comp muscle magnum cam looks like my choice for a 383 with 3.23 ,that high lift one will idle and drive around awful and have stink exhaust, that was my experience any way .Way easy to over cam a 383.
It's very easy to over cam any engine. And for this engine I really want to find the cam that really makes it shine.
not too big and not too small and that's why I ask for advice from you experienced people.