408 on dyno, what will it make?

Dyno session tomorrow!
Take a stab at what this combo will make.
408, 10.1/1 compression, EQ heads with 2.02 intake valves, bowl ported, 272 cfm at .600 flow. 850 quick fuel Q, Comp 235/249/107 duration. @ .050 cam with about .560 intake lift, Airgap intake on top of 1 inch open spacer, dyno headers, probably 1 7/8 tubes.
Second guess on power;
the motor will be tested with 1 5/8 step to 13/4 with 3 inch by 18 collectors, 14×3 air cleaner with high flow lid.
What do you think it will make in each mode?