I used Autolite 104's when I was NA and now use 103's with the boost.
When I go to the parts store; I DO NOT tell them what car it is for. I simply ask them, "Can I get the 4 pack of Autolite 103's (or 104's)?" No questions asked; I don't let the guy tell me whats best for my car.
2004 SVT: bewst'd!
2010 Ford Escape 3.0 V6
2004 F350 6.8L V10
1986 XR4Ti 2.3L Turbo, 15 psi
2007 ST ; formally bewst'd - R.I.P