Thanks Whip, I am very happy with the way my Allison runs just the way it is but I have a Cougar 21 that I may change over to a 300XS when the current 280 needs a rebuild since I use it for some real long runs on the Delta. I keep hearing that someone is has done this but when I check into it closer I find that it was done on a 300X or 300 Pro Max. Those mids are different. The way the water is handled on the 300XS is different. The only guy that I know of that has done it and made it work well spent a hole lot of money on machine work and it was a one off thing. So I keep asking this question since I know it's just a matter of time until someone comes out with the hole kit to do it. I will try to get in touch with the people you mentioned. Thanks for the lead.