440 power gains/ aluminum head advantages?

I would degree the cam with a degree wheel, if at all possible, even if you install another timing chain set. Plenty of instructional videos on the web to help you along. I once installed a big name brand double roller chain in an LA smallblock I was building. If I hadn't degreed the cam, I wouldn't have seen how retarded the timing chain set was right out of the box. I verified multiple times and kept coming up with the same numbers. I don't know if it was a manufacturing defect, or what, but the replacement chain was spot on. If I used the defective timing set, I would have had a horrible running engine, if it ran at all. With a 4.56 gear, you should have plenty of pull in 3rd gear if everything is right.