[JooktheSnooke]

Hello all!
Ive been reading these forms for a while now...and just became a member. Therefore, this is my first post and i can really use some guidance with my 2010 camaro ss.
I just finished doing the cam install in my ls3. I need some help The cam is texas speed & performance, stage 2, 229/244 .629"/.615" . included with the cam I also installed a new oil pump, timing chain and sprocket, lifters, push rods, valve springs, rockerarm trunion upgrade, got the heads cnc ported, spark plugs, and long tube headers.
When i went to start the motor for the first time, it was misfiring a lot through the exhaust. it sounds like gun shots. The check engine light came on with code P0300 (multiple cylinder misfire) after this happened, i removed all the spark plugs and found them to all be soiled except for cylinder # 1 & 5. I checked compression on all of the cylinders, they were all at 190 psi except for 1 &5, they were at 170 psi. after doing that i checked for spark on all coils, spark plugs, and spark plug wires. All was good there. Fuel injectors were also good, because i made sure they all sprayed doing the cam install. I am not sure if this is happening because of push rod length, or if the valves are not seating correctly. Or if the car just needs a tune to fix the problem. I read some forums on here about the misfire issue, but most of them talked about the check engine code.
Any advice or guidance would be greatly appreciated