Thanks Alan good info there. It sounds like more may be coming in the next few months. I should get my name on a waiting list with someone.
The alkydigger piece was pretty good, it was similar to the 4” spacers you see everywhere, but it was relieved under the bolt flange so it would clear the tops of the runners on whatever intake you were welding it to. It was also cheaper than most of the spacers I see, IIRC, around $350/$375, vs $500 for a spacer, and you would still have to get the underside of the bolt flange milled away if you used a spacer, add in shipping (I am in Canada) and you would easily be into the spacer for $700+ before you even start welding it to the intake you are using. By that time, you may as well buy the BT and sell the Porto-sonic, and not have all the hassle building an intake.