Imo, in that combo........without testing it back to back........ I’m not sure it would be worth anything.

For sure........ it would be way way down the list of things I would prioritize money being spent on for that application....... unless I could see decent test data where it was worth enough power to justify the expense.

“The test”........ to see just how bad the intake manifold is hurting the power is to try a Performer RPM against the modded stock piece.
I think it would show you where one might need to concentrate the time and $$$.

Of course, if the difference was only 10-15hp........ then I’d be more willing to spend the resources somewhere else.

On my lowly 383 with stock heads, the RPM was about 25hp over a stock 301 intake.
I’m thinking on a 499/511 with ported heads, the difference could be more.

Tested on consecutive days, two very similar stroker combos running the same ex manifolds....... one with a ported 301, the other with a 6bbl..... the difference was over 60hp.