Test and tune tomorrow

Well I got the Comp shocks put on the car today and changed out the 600 Holly to the 750 Edelbrock. I took it for a test run and it pulled hard to 6,000 and I shifted. The little holly would just pull to 5,600-5,700 and was starving the last second or two of the run.

What is a "safe" shift point for me if it is still pulling hard? 6,000? 6,200?

The 600 Holly ran like this:
1.84 60' and a 13.1 at 103mph

How do you think the 750 will do?

Here is the total build:
75 Dart weighed 3480 with me in it.

holly 600 DP (changing to the 750 Eddie)​

weiand x-cellerator intake​

cromoly pushrods​

cam is sum 20-232-4 .480/.480 lift 280/280 duration with matched lifters & springs​

9 1/2" X 26" MT's​

2600 stall​

suregrip with 4.10's​

cheetah manual valve body​

shift kit​

8 1/4 rear​

904 tranny​

ss springs​

3 way adjustable shocks​

MP distributor with msd2 coil​

J heads with stock valves but mildly ported​

Dynomax headers with X pipe, 2 1/2" exhaust, magnaflow "wideopen" mufflers​