The thing is porting will change compression numbers hugely. 150 psi is not really close to where I would assume they would be, unless he is running too much squish clearance and has a 1mm or so higher exhaust port. Hence, I need to know and dont like to make assumptions. There are too many times when people on here just want to shoot something off and dont really worry about what the real answer could be or should be. You have to ask questions, get facts, and then formulate an answer based on that.
In example: Sunday I am chilling on the couch watching some tv. The neighbor guys come over and say the little kia sephia commuter car one of them owns broke down. The clutch apparently doesn't disengage and allow you to shift gears. I go through everything and tell them it sounds like the clutch slave cylinder or the clutch master cylinder went out. However, I ask some questions and tell them to see if there is anything that looks like shredded fiberglass in the trans bell housing. They come back and say yeah. I say ok, well your clutch disc is probably toast also. So the one guy takes the car in and has the repair shop put a clutch master, and a clutch slave cylinder on it. Never tells them the clutch is bad, or what I told him. They do the repairs at the tune of $300 and give him the car back, car drives like shit and will now pop out of gear and do crazy lurching stuff while it is running down the road.
The moral of the story is, ask questions, get the right answers, listen to them, and life is then cheaper and easier.
So do the compression test right, ask your builder some questions, and check your squish.