ORIGINAL: 46u
I am so use to STS engines coming with all the shims you need for what ever fuel you run. Let us know how it goes and good luck.
yeah i know..most of the engines come with heads shimmed to 20% ... not many have the shims for 30% from the factory except STS and a very few other. i can't wait ill i can get my hands on one of the MKII's