some info on a 440

Look on the engine ID pad, near the distributor:

http://i183.photobucket.com/albums/x265/375instroke/motor02.jpg

You can see it directly off the end of the dist. clamp. It should have 426 or 26, or 440 or 44, etc stamped there, at least enough numbers to tell for certain

If that pad is not there, it's a low block, IE 361, 383, 400