just install 5 point harnesses...that'll keep you in place

or put one of those pads designed for putting a jute-backed rug on top of wood floors between you and the seat, and wear leather pants.

1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)