There better not be any less plns and clips on a 451.
The 450 has 1 screw, two pins, per side and 3major screws - 2minor for the rear. No clips (that's for the two rear fenders, rear panel and valance). My time approx, not rushing, 5 minutes
Any less and you might as well use Velcro
BTW: Time to learn a new term; 'Keyhole pin'