You're in luck. According to TAV109 of the '78 FPC it takes Qty 4 of #40283202 Assorbitore di energia You can find the '78 FPC at Steve Jenkins Private Document Collection web site: http://ferrari.jenkins.org/books/ Suggest you download copy & then you too can be an expert like me...
Henry, Call me or come over. I just did my bumper shocks, on mine the rears were the same but the mounting holes were alignend at 180 degrees difference. Rob