hey guys I need some help... I sank my truck in the water.. up to the steering wheel. I got the truck going again, after days of draining/refill. The truck has developed sound, sound first like air escaping the collector gaskets. I changed the gaskets, and i am about to change the exhaust manifold gaskets... it sounds like it is coming from underneath the exhaust manifold gasket, now i am leaning towards rod or possible something in auto TH350 transmission...I give it gas, the sound gets louder. I would appreciate all inputs, I also posted this in 73-91 forum, i was told i should ask you guys.