Has anyone had their dual exhaust start rubbing and make it seem like the transmission making noise

Good day. I have a 1972 Dodge Demon. I have the headman shorty style headers with dual exhaust. I haven't jacked the car up yet but I have a weird noise coming from the exhaust/transmission area. I put it in park I dont hear it all the time. Soon as I put it in drive and let off the brake I can hear it. Transmission shifts good. The noise gets louder as I'm driving it. I was jus wondering if that's the exhaust giving me problems... Just let me know wat ya may have encountered.