Hey!
So I saw your Luffy rock-throwing calc, and after doing some math, I found that 2.178722e16 kgf is equal to 2.13659641e17 Newtons, which is 2.13659641e17 Joules (since 1 Joule=1 newton), which is 51.066 megatons (which is just 1.934 megatons away from Baseline 7-B+).
That's a big buff if it's accepted, especially since Luffy was severely weakened at this time, so a healthy base Paramount War Luffy would likely upscale to 7-B+ (since the difference between 53 megatons and 51.066 megatons is only 1.038X).
The main question would be whether post-timeskip people who currently scale to Pica's calc (or multipliers of it) would scale, since it's unclear how people who currently scale to Pica's calc currently scale to Pre-Timeskip Marineford Luffy.