One thing to really watch out when using this pan as it about drove me nuts with an oil leak was the flanges are really heavy duty on these pans and wider than a stock type pan. Well on my Keith Black block the main stud extended a little lower that on a stock block and the pan flange was catching on the stud and not letting the pan bottom out. You couldn't see it in the car and I thought it was a rear main seal. IT WASN'T. Its a simple fix as all I had to do was remove a few threads but like I said finding it wasn't easy.