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.
New Ride: 2004 SVT
'10 Ford Escape 3.0 V6
'86 XR4Ti ; 2.3L Turbo, 15psi
1988 F150 Custom
'07 ST ; formally bewst'd - R.I.P