baja bug

Couple weeks ago I picked up a 1970 vw Baja bug off a buddy, totally new to the whole vw thing, from what he told me it has a 1835cc engine with stroker crank and cam, 009 bus transmission, some cheap kyb shocks on stock suspension, new bfg tires, engine cage, new brakes, and other misc. My question...

Hello my name is Nathan and im going to come upon a 1975 vw bug and I want to change it to a Baja bug. Other then changing the fenders and body panels what else would I need to do/change if I want this bug for dune play as well as trails both dirt and mountain?