There right, but if you must you can contact becool direct, and they have a nice set up that will drop right in. Had problem with my first radiator set up with two 11" puller fans, didn,t have enough room with the electric water, on the big block in my 67 cougar. So they work with me and got a real nice set up with to 13" pusher fans and with a little work it set right down in there.