Recommended mods/combos

I just bought a 88 LX coupe that's been sitting for about 4 years. It ha a funny noise so I went ahead and took the motor out and apart. I was told it was bored 30 over - WRONG! I do know it was running 12.7's in the 1/4, seen it myself. It has a GT-40 intake, MAC equal length headers, don't know any cams specs yet. I plan on GT-40 alum. heads and 125-175hp hit of nitrous. What are good cam combos, pistons, etc. I have about $3000 so far that I can spend but it will grow. I was thinking 65mm TB, not sure of mass air sensor size, 30lb injectors, 155lph pump. I'm open for suggestions because if I hear 5.0 slow at work again I'm going to show them the true meaning of road rage (again)!! Especially when they drive hondas and cavaliers. Thanks in Advance.

compacam e303

I pulled the rest of the motor apart and it has the E303 cam but also compucam 2040 stamped on the end. It high 12's possible by what I described?

I wonder if they smoked their original engine and just put the GT-40 intake and cam back in. It definatly sounded mean and ran good. I don't know enough about heads to know if anything has been done.