*sigh
......what does any of that mean?
You are blindly going down a rabbit hole. You do not understand what you're buying, nonetheless you're buying it anyway. What cam? And why did you choose it?
There is more to building an engine than just choosing a bunch of stuff from a parts catalog. If you trust DSS to advise you, then why not consider buying a complete engine from them? They've got a whole bunch of proven combos already sitting on a pallet just waiting for you to buy it.
All anybody needs to know about buying the wrong sht for an engine can be found out by a simple phone call to my cousin in Council Bluffs IA.
He'll tell you how he traded a complete 350 short block for a worn out 302 ( Chevrolet 302, because he had a hard on for the Z28 Camaro back in the day,.and z28's had 302's in them). He'll tell you how he put the biggest freakin cam he could find in that engine, and with only had a 3.08 gear set and a 2500 stall converter in a turbo 350, ended up with a car that took a half hour to get through the quarter mile.
Hell also tell you how ( because he didn't know jack about building engines) , he just didn't bother to put all of the oil galley plugs back in...and he'll go on to tell you that he couldn't figure out why the engine had zero oil pressure at start up.
Then he'll tell you that even after his cousin finally talked him into building a 396, he couldn't wait till the cousin came over to his house to install the timing set for him, and he'll tell you that he did it himself instead, and ( because he didn't know jack about building engines) put the dots on the timing set 180 degrees apart from each other... Then he'll tell you how after attempting to start that engine ( unsuccessfully) he bent every single valve in the head when they crashed into the Pistons.
Because he couldn't wait for his cousin to do it for him.
I could go on......But again,..you should get the gist of the story.
If you don't understand the stuff you're buying, then you are straight out wasting your money. Pay somebody to do this for you, or spend the time required to learn it before you buy it. After all, you may not have a cousin to help you, and you'll end up blowing up a whole bunch of sht in the meantime..
Just ask my cousin from Iowa.