Patrickt .... I can tell you one change .... I think . I`m currently building #757 and went to install the 4 "
oil cooler and it won`t fit . Seems the opening between the inside of the scoop and the sheet metal that the fittings go through is a little over 4 " and the total height of the cooler with support bracket and mounting bolts and clips is close to 4.5 " . I verified this with Rob , the
oil cooler man at ERA yesterday . He says the cause appears to be that the body changed in the scoop area and the mounting sheet metal didn`t .... but they would check further. Since I have been unable to find the special tool to make it fit ( BIG hammer ??? ) , I`ll be installing the 6" cooler as soon as Peter sends it .
I have both manuals and it appears that more detail has been added to to the new manual to clarify some things and add more detail .