edelbrock magnum head flow?

I think you have pretty good heads already.
As an example i just took out a stock stroke 360. Stock everything bottom end..rods, pistons, crank.
950, airgap, 1 5/8 headers. Maybe 10 to 1
Cam was 260/264, 565/565 lift, 8 inch vert, 3320 race weight
Heads were eddies that went a tiny bit better than stock...255 at 550 lift. 11.26@119.....
With the right cam and vert your combo is capable of easy 10’s.
I just installed a 4 inch stroke motor with same cam, heads now go 272@550, same headers,more compression...10.70’s with bugs still to work out...
With your heads the way they are, you could go low 10’s easily with a stroker