todd,
it seems that you are a guru around here. i wish now were the time to be swapping motors and i would be very interested in the 3.6. i am curious as to your opinion on how the 3.6 x51 stacks up against the raby 3.6? also i am just beginning to collect parts for a future engine build. is there one type of header or diameter that is better than others? thanks for your time. again i wish that your motor was being sold later, iirc the x51 has the extra scaveging pumps in the heads etc doesn't it? your motor sounds like a really good deal. best of luck on the sale.

brad