104* or 108* ??

Hello I am getting ready to begin assembly on my 408. block should be finished Wenesday. Here is what I am thinking, about cam istallation. Since the car is a street car only I am consideing advancing the cam 4* to give the motor better low end. Here is my combo.

9.2:1 comp
ported J heads w/2.02in/1.60ex
tti headers & 2 1/2 exhaust
4 speed
3:55 sure grip
27" tires
rpm air gap edelbrock 750 eddy carb
msd billet dis & 6al box

Cam MP 284/484 108* in Cent. 68 over lap ( I know there are better cams, but this is what I have to work with right now)

Would degreeing this in at 104* help the low end or should I just stay with 108? Street use only.

Thanks everyone you have been a great help!!