Seems like the dyno results I got were similar to the 1955 GM reported net hp. But the gross torque comparison seems similar between the Gm and the shop dyno.
Makes me wonder if the apple to apple issue is more like the difference between the technology of GM 1955 factory dyno vrs the 2023 shop dyno ;or the 261 head is better in terms of hp over the 235 848 head ? ; or possibly hei ignition and fenton headers are both all candy
