Battery fitment in Lancia Beta-series cars is challenging, and only >one< size of battery is correct:
Group 47
9A47 / 647MF, 8447, 7547, 47-600, MT-47, 347047-600 with sunken battery posts left positive.
Length:9.56in / Width:6.8in / Height:7.5in
NOTE: Midwest-Bayless does not sell batteries.