When you get the 187 (the 699 pan will also work) you'll probably notice that it has no baffles in it and those you need. You can fab your own or do what I did, go to a wrecker and buy an old 400 pan that's got the baffle and switch it over. I think the old 400 pan cost me $10. Also an investment in a Milodon windage tray (don't like the Mopar tray) is a real good idea to control things down below.