I'm glad this write up has been a help. I think the y7 manual stiffener would work, I really have no idea if the y7 auto stiffeners would work or not. But I've never messed with different combinations like that so I can't be sure. I think your best bet is to just get a y8 oil pan. there is a used one on ebay right now for $65. Unless you can get the y7 stiffeners for really cheap or free it probably wouldn't be worth finding out.