Going to put new dual exhaust on my 62 gmc fleetside. I have a 350 chevy engine. Auto tranny. Straight manifolds no headers. Was thinking about shooting the exhaust right out in front of the rear wheels going with 2 inch pipe and thrush glass packs with a 2" to 3" angled chrome tips. Questions...Should I run it over the axles? Straight out the back? Behind the rear wheels? Give me some advice.