I recently got done installing a completely new top end on my 94 gt. The engine has 127,000 miles. I installed a new e303 cam with aluminum heads, 1.6 roller rockers. and victor jr intake. The car ran fine for 500 miles. It's starts smoking about 2 minutes after it's been running. Would this problem be due to the rockers not set correctly? Or is it my fear that somehow the rings gave out on me? Thanks