The original MSRP for that 1971 VW Transporter Campmobile was $3,440.
12v
12 volt type4
According to the VIN you typed, the Volkswagen Official Service Manual indicates it is a 1973 (Kombi or Campmobile).
Remove the cables from the top of your battery. Remove the battery stabilizing retaining bolts. Reverse the process to install your new battery.
By checking battery voltage while the engine is running and the lights are on.
Anyplace that sells batteries will have a battery that will fit. It does not have to be a VW battery.
How to remove front seats on 1971 vw Beatle
Check this site, it should answer your question about the value of a 1971 VW. http://www.nadaguides.com/Classic-Cars/1971/Volkswagen
All 1971 VW Beetle engines were manufactured with solid valve lifters.
Controls for what?
Need the year and model VW to answer the question.