I guess many people have a preference, but I know a lot of people I skate with that ride the 80s / fish shaped / tapering boards will often have a bit of wheel sticking out at the back, with wheels often just on or not too far under at the front.
Many boards of about 9 to 9.5 at the widest point will taper down so much that something like Indy 169s almost feel too wide, so 159s fit a bit better, but 149s often feel too narrow unless on some fat (wide profile) wheels like 60mm Slimeballs. I had just set up a board with 129s and Powell Mini Cubic wheels, as those things are so super wide and need a really narrow truck, but the board didn't feel that stable, when compared to other boards with wider trucks and normal wheels.
The widest point of the board still sits out past the truck or wheel line so you are not likely to catch a toe on a rear wheel or axle, but for those who are not a fan of seeing wheels at all, riding more narrow trucks does have some tippiness but might be a safer option.