.3" is negligible. You won't even notice the gap.
I load my 400EX in the back of my dad's F350 that has 35" tires and a 2" lift wit no problems. Like 700xxx said, just make sure to use the straps to keep the ramps from slipping off. If you're worried about the angle being too steep, back your truck about 1/8 of the way up the driveway (that is, if you have an angled drive) and load it like that.
Red '05 TRX400EX:
|White Brothers E-Series Exhaust|Stock Header w/ Welds Ground|Gearing: Trail - 14/39, Dunes - 13/39|Primary Drive Sprockets and Gold X-Ring Chain|Sparks +6° Key|42mm Keihin Carb|ESR Airbox Eliminator Kit|Tinner Scoops|TAG T2 Bars|Burgard +2 A-Arms|G-Force Extended Hubs|KFX 450R Shocks|DirtSkins Shock Covers|IMS-Roll Classic Bumper|AC Racing Blackline Pro-Peg Nerfs|ITP Holeshot H-Ds|Skat~Trak Extreme Paddles, GBC Dune Tracker Fronts|
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