I dont really trust the OEM seatbelts in my truck either. Mainly due to the auto re-tractor things. I had a 90 mustang and retro fitted Simpson belts. I know they will draw up and stay tight. OEM auto belts your relying on a weight to get slung fast enough to lock up.
2013 XCT added Jan 2015
pull back bars, passenger arm rests, HID Low beam, Silverstar Ultra headlight high beam,Drag Specialties Pillow Top seat with driver backrest. Glasspack mod Mufflers.
2009 Royal Star Venture-Traded Jan 2016
Trailers are for when it's broke aint it?