The 12v model of the 1967 vw beetle is a group 42.
under the rear seat
Should be a 12 volt battery.
A "Group 42" battery
You need an international battery.
Under the rear seat, towards one side.
1967 and later models have 12-volt systems (12-volt battery) !!
What size battery for a 66 bug
12 volt
Should be on the passenger side (right) under the rear seat.
In the 1967 Type 1 Beetle you had the 1500 cc engine, the Type 3 had the 1600 cc.
Group size, 42.