[Robznob11]

im running 4th gen f bodys and I had to take about 1/2" by 4" section out of the bottom of the frame rails on each side and also shorten the collector on the driver side some because it kicks out towards the frame. but it mostly depends on how your engine and tranny sits because I could have jacked the tranny up and cleared the frame but I could not because of my engine setting back so far and clearance issues with the drive shaft hoop. also depending on your hedders and where the engine sets the primary on the ds comes close to the lower control arm. but all hedders and styles vary. they should work with little effort and also they don't tend to hang under the frame as much as truck style hedders!