100 octane yes, make sure you pay very close attention to the amount of boost. 4 - 6 pounds on 100 octane will be fine, any more than that will be border line for detonation ( KB pistons will not tolerate any ). Make sure your timing is 32 or 34 degrees and use a colder spart plug, such as a NGK - 8
I think the number is 5672-8 for the sportsman heads or AR133