[Extremestang]

I own a very modified v6, dont hate me for it, but it is quick for what it is. Anyway, not long ago i upgraded the transmission and the driveshaft, along with a double hump crossmember and an energy suspension tranny mount. I also added the lakewood safety loop(i snapped the old driveline at the yoke, it wasnt pretty) the output shaft housing snapped into a 45 degree and the rest fell out. My concern now are two things: A very annoying squeek at heavy acceleration(not all the time) and a slapping noise(tap on metal sound) on acceleration and deceleration. Could it be that body flex is making the safety loop hit the frame tunnel? And does "tweaty bird" live in the urethane mount? I knew they could make noise, but wtf, its horrible. Please help me understand how to get rid of the noise, your help is appreciated. Thanks.