I used the same set and it hit my floor pan also. I had to go back and make new tunnel to fit, I used the same bolt pattern just raised the height of the tunnel.
Thanks..I see a bunch of folks using the kit but never hear anyone discuss the clearance problem. First I plan on modifying the aftermarket trans cross member that came with the car to give the trans (4L60E) some clearance then I'll go back up front and probably just modify a set of after market motor mounts that also came with the car to lower the engine and set up the driveline angle.
The trans oil pan will be below the frame rails...but I expect good ground clearance anyway. Also expect to modify the hump floor plate cover just a little bit.
BTW: There is no body/frame mounting material
....metal to metal right now. That alone will raise the body about 1/4" once I install it.
In no hurry.... just knowing that those motor mount kits aren't just drop in...helps a bunch!
Thanks