I would have CP custom make you pistons in 10:1. I tried to organize a group buy for this a few months back, but almost nobody was ready for that yet. I was planning to reintroduce it in December or January to see if anyone was ready. If theres enough guys ready to go right now, I can set it up.. the pricing was really good if we could get 7 guys. 5 more after you and I
I had a thread about it:
Feeler: CP Pistons, Medium Comp, 10:1
10:1 is the lowest I would personally go.