Took the old camaro out last weekend... Was going to check the timing and to my surprise there was not a single timing mark on the dampener... wtf! So I couldn't hook up the timing light. I left the timing where it was at and worked on my exhaust, I pulled the cats and replacement muffler to make way for 2 dynomax bullets!!! I fired the car and loved the sound but I noticed It idled higher out of gear more-so than with the replacement exhaust.. Witch you would expect due to better flow. But now when I put the car in gear it wants to stall immediately! In park it has to idle at 1500rpm just to run 500rpm in gear. Does this sound like a timing issue or a carb issue... And If I make a timing mark on the dampener what should I set my timing at for optimal power and torque??? Like 8* right? The motor is only a 305cid stock engine besides an edelbrock performer intake "dual plain" with a holley 650 dual feed.