I recently enhanced my garage with a Sun 1115 Performance Analyzer and VAT40 starting/charging system tester, both date from the 1970's so are a perfect match for my '73 E3.
20181108_145511 by Robin Derrick, on Flickr
20181108_145032 by Robin Derrick, on Flickr
20181108_145511 by Robin Derrick, on Flickr
20181108_145032 by Robin Derrick, on Flickr