thank you Martin D for sharing this AC 428 with me! I've never seen one before. The AC 428 is a British GT built by AC Cars from 1965 to 1973. Production was 81 cars built in total, only 30 were spiders (convertibles to anyone not in Europe and Asia)

AC took the resulting 427 Cobra’s robust coil spring-and-wishbone independent suspension chassis, added six inches to its wheelbase, and sent it to Pietro Frua in Italy to be clothed with a luxury coupe body; a Spider followed shortly.

 Power came from the same Ford 428 big-block V-8 engine rated at 335 horsepower used in the majority of “427” Cobras.

The body resembled Frua’s Maserati Mistral and Monteverdi GT

 Grand Prix privateer Rob Walker, heir to the Johnny Walker whisky fortune, bought one of the 30 spiders

https://rmsothebys.com/en/auctions/mo21/monterey/lots/r0017-1968-ac-428-spider-by-frua/1103736

Thanks Martin!