You are still seeking permission from someone to push this thing till it blows,
probabily so you will have someone to blame besides your self.
The locked timing will help with that big cam, improve idle improve throttle response etc.
It wil take the timing curve out of th equation. to evaluate the real performance.
Seat of the pants will not tell you anything.
Get some slicks so you got traction. Get some good gas so you don;t bust the motor
go to the track and make 1/8 mile passes. (4.88 gears) The MPH tells the HP story.
1/8th mlle MPH x 1.27='s 1/4 mile MPH
Thats your dyno. Higher track MPH ='s more horsepower.
you need traction for meaningfull test results.
If you keep insisting on feeling your way thru this and ignoring physics all you are going to feel is mother nature slapping you up side the head, and punching you in the wallet.
I do all my power adder testing on high octane gas FIRST. You should too.
you are making this 300% harder than it needs to be.