School me on supercharging a 360

Bill Dedman said
Here's my 360 Magnum with a stock short block (except for a Hughes cam), stock heads (very minimal valve bowl cleanup and a 3-angle valve job), a 750 Hollley double pumper and an MSD Boostmaster ignition (boost retard.)

I tried to upload this chassis dyno sheet for the car, but it didn't make it.

Here's attempt number two....