what exactly is the question? As for the compression ratio with boost It can be done but it will need to be well tuned. I have read of 10.5 - 11 to 1 ratio cars running boost. About 5 pounds. That being said I wouldn't want to do it. As for the cam I would maybe get a H.O. firing order cam and sell the non h.o. cam.
Im confused here... you have a non-HO cam and you have rearranged the wires for a non-HO firing order....but your injectors are still firing on the HO sequence. I dont think it would be running at all?!?! I see you have a SCT chip so im guessing that for the car to be running at all...the firing order in the computer MUST have been changed? This is an easy change in the computer. Like i said before...if you car was getting spark at the right time but fuel at the completely wrong time...the car just would not run. I think you need to bring it someplace where you can take a look at the tune on that SCT chip. As for the compression ratio...you are still less than 10:1 so you ok up until about 10 pounds of boost. I wouldnt worry about the boost. If you know you are lean however...i would bring it to a shop that can check out the tunes on that chip. good luck man
Even if that was possible, i still dont think the car would start without the right injector firing order. So you bought the motor from a guy who built it? What about the SCT chip? Was that already in the car before the new engine? I think you need to figure out whats going on with that chip. I dont think there is going to be a simple injector harness solution for this problem.
It is possible to re pin. I guess what you would be doing is pinning to the non H.O. firing order. The thing is with the non H.O. firing order it doesn't make the same power as the H.O. firing order. Something to do with heat issues. Anyways I still think that getting a H.O. custom cam would be a better idea.
Its not like a over heating issue it had to do with firing cylinder order. When you fire cylinders 7 and 8 back to back that park of the block produces more heat. The H.O. firing order makes more power because it eliminated this issue. The chevy guys have been installing custom cams in LT motors for years fixing it firing order getting away from those 2 cylinders firing back to back. They being chevy did away with that firing order with the new LS motors. Basically if you were to label chevy cylinders like the ford the new LS motors would now have the H.O. firing order. It makes more power magizines have proved it. There was one in car craft maybe 6 months ago.