teenage girl and a slant six

Ok my daughter is going to be driving in a year. Seeming I have two Scamps and she wants one we have agreed she will get my slant 6 "Lorraine". I already have a full super six setup, I just picked up an 8.25 so she can have the bigger breaks and a better rear the the 7, HEI, Will also get front disk for her. But me being the silly buffoon that I am I just spotted a craigslist add with a guy selling clifford headers and 4 barrel manifold. I like the idea of the car not having too much power for my young lady. Your guys thoughts on this? Stick with super six or go for the clifford setup?