Hang on a sec, are you sure that's a Commando short block?
That should be a 10.5 engine with domed pistons and a 248/248 cam.
My FSM does not list the LSA.
If I assume it's a 112 and in at plus 4*, then the Ica comes to 52*. When I plug that into the Wallace calculator, it spits out
191psi at 300ft elevation.
If that's true, and I do not know that it is, then your "commando" is some 50 psi down on pressure.
IMO, and if it was mine; I'd be doing some more investigating. Maybe I got the wrong cam info. For instance, if the 235hp cam was a 276/112cam, then the Ica could be 64 degrees, and the proper pressure would be 172 psi, which is still a Loooong way from 145average