I strongly suggest to not do it.
If you are determined to use a Gapless, Use the Top Gapless. I still say don't do it.
The boost levels you are talking about I would use the Total Seal Conventional AP Stainless top and the Ductile seciong with standard tension oil rings.
Best thing to do is top call Total Seal and talk only with Keith Jones and tell him what you have and the use and follow his recommendations. If he does recommend the Gapless Go For It.
I am not a Gapless Hater. I use them a lot. I did quit using the Second Ring Gaoless though.
Ed