Bass restoration, HELP!

Hi everyone, I am getting into playing the bass and came across a relic my dad built in the 80s as a school project! Sadly he told me he built it as a project solely and not really as a bass to be played. The neck was taken off of a bass that was recked in a concert, and the body was built my mu dad and my grandfather! I really want to do my best to restore it to a playable state, but I am no expert, I ordered a bridge from aliexpress aswell as a carbon fibre plate for the electronics, my main problem at the moment is digging the neck pocket to make it compatible with the bridge I baught, pics of everything below, any thoughts?