i just talked to milodon today about the same thing your asking and the guy was not very informative in other words he didnt know s-it, i asked if this pump was modified to work with the aftermarket blocks like World Prod. to enable the inlet on the World block since the other Milodon pump is known for not pulling oil from the inlet on the block, he said it should but it wasnt a for sure answere to me, i also asked if the gears were the same diameters cuz in pics the billet doesnt look as big as the other pump he said they were both same, then i asked if there were any ports on the billet pump he said i gota use additional adapter plates for the external lines, i gave up i cant stand talkn to ppl who answere with IT SHOULD WORK they need to go find somebody who can answere with knowledge