i have a 89 iroc z28 5.7l with 700r4 trans. i installed a deep engine oil pan and now the y-pipe exhaust can't reach the manifolds. i don't like the idea of the crossover pipe installed next to the oil pan anyway. i think it could heat up the oil real bad. i want to install long tube headers and i want advice on what brand and model # worked well on your camaro. thanks