5.7 in 65 Cuda w/tube axle

milodon makes a pan for the new hemi in an a body. the part number is 31000. You will also need the pick up tube. It should work for you if everything is in the stock location like you say. And as long as your axle is lower than the factory k member. It's worth a shot summit has the pan you could order one up, and if it dosent work return it.