Since no one asked I’ll throw my .02 in with PRH.
IMO the best plan is to first figure out the “why” the testing is being done. Is the testing to find the best street/strip head package (and then you have to define what that “best” is) or is the testing for the best overall torque and power curves, looking at an arbitrary converter stall number?
Once you define the “why” of the testing you can outline the types of test(s) to be done.
Then you have to decide if minor differences in chamber shapes and such will require testing to develop the correct timing curves for the different chambers etc.
Are you going to do lash loops on every head or just optimize the “A” head and run the same lash on every other head?
Are you going to go back to the “A” head at the end of all the testing to verify the numbers have remained consistent across all the testing?
How many pulls on each head?
Do different heads respond to different intake manifolds? If you test for that then you’ll be making probably a hundred pulls or more depending on how many heads are in the test.
Pushrod length affects rocker geometry and lift. If there are different stand heights and locations and the geometry is different how do you know how much of the gain (or loss) is attributed to the head or the change in geometry/lift?
You can really end up in the weeds with this kind of testing. The more heads the more testing.
I agree with PRH about just one chinesium casting. Probably the Speed Master as the base head and then test the TF and the Bloomer head against that head.
I’m excited.