Tried to install my Windsor motor last night using the upgraded Poly motor mounts from FFR. I first installed the mounts on the engine then tried to install engine in car. The passenger side lined up fine (both the bolt and the pin/button) but I wasn't able to get the driver's side mount to fit (the large bolt fit into the slot on the frame mount but no matter what I did, I couldn't get the motor into position to let the little pin/button fit into the hole). I'm sure I have the mounts on the correct sides. Could there be a problem with the mounts, or the frame mount?