Is this to much cam

How will you be using the truck? Drag racing? Hauling firewood? What trans?

Are you wanting to stock with stock valve springs to keep costs down, or are spring upgrades and option? If the springs can be upgraded, then faster cam profiles can be used to help it breath while keeping shorter duration.

Is the original engine? If so, I am thinking it would have even lower compression then the typically low car 318's. So that may play into this.

BTW, good move the change cams to take some better advantage of the parts you have already added.