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the only thing im worried about is pinion angle and will the u bolts be under any added stress that they will snap. Thanks


If they are the factory bolts that kinda flatten out in the area around the axle tube, with a 4 speed I'd replace them with the ones that keep the same dia all the way around, like those in the pic. As someone mentioned earlier though, you definately need to box in the back half of the perch especially on a 4 speed car or you WILL bend them. My Dad's car had this happen and it is only an 11 sec auto trans car.
Here is how mine were.