hey mike its jim q maybe you know I pu a 69 dart with a 318 in it that's what was told to me but when I checked the no on the block drivers side 4006530-318-78 the first set is saying its a 400cid not sure what the - 318-78 build date? is this a 318 or 400. also has a edle 318-360 intake and dist is in the rear at fire wall little confused on what I have any help would be great.. thanks