A fast-rate 272 will be close to the edge for pump gas
Installed at 104 for an Ica of 60* and with an Scr of 11.3@2500 ft the Dcr comes to 9.3 and pressure is predicted to be 185psi@163VP.
If you go down to 800ft, the pressure climbs to 194 and depending on your tuning skills, there may be times when the engine gets into detonation on anything but the best gas.
If your intention is to stay at 2500, then you can run up to 200psi. To do tat you would have to decrease the ICA or increase the Scr. The former means a smaller cam and the latter means machine work.
To be continued
