A little bench racing

Ok folks, another what do ya think question. Curious as to where you would shift this turd at? I realize I don’t have the optimum combination but working with what I have.

440 stock bottom end, forged crank, stock rods, pistons. Unverified CR guessing 9.5ish. 180 cranking compression.

For the sake of argument, stock 915 heads. Was told they were “mildly ported and the chambers cleaned up”.

Comp XE 275 HL with 1.6 rockers and B3E geometry correction. Pic of cam card

View attachment 1716052389

Schumacher headers

Weiand tunnel ram 2 750dp w/annular boosters.

727 3k +\- stall

Dana 60 w/3.23

I’ve been shifting @ 6k, curious if maybe shifting at say 5k would possibly have any benefit? Just thinking out loud, killing time in my head.
What RPM are you at going through the traps? That combo is screaming for more gear(just a personal observation, not pertinent to your current question)

How does it feel shifting at 6k? Still pulling hard?