Mopar Performance Purple Mechanical Camshaft - P4120653AE Cam Card

Hi all,
No hi jack.
But With this AJ post I'm curious
About where to Install this cam in a bbc
That only has about 8.5 -1 compression
Trying to give it as much bottom end as possible.
Howard's says install 4 * advanced or
4 * retarded on the cam card.
So with it already having 4 * advance
Ground in are they saying another 4 *
Plus or minus?
With the 112 Lsa,View attachment 1715776494
View attachment 1715776495 I'm thinking 8 * advance in at 104?
Ps. I'm asking here because I don't belong to any chevy web. Sites...lol
Thanks in advance...no pun...
Btw. This is a hydraulic roller in a 468 ci.
if that makes a difference...
468 inches and 227deg @050 your gonna make plenty of torque. I’d be willing to stab it in on split overlap and at least try it how Howards designed it. Then advance it if it feels soggy. I bet it won’t.