I would recommend Tim Stanford Foreign Cars in Fort Lauderdale; which is approximately 30 miles north of Miami. Tim is well known for his expertise in the 3x8s as well as other vintage series.
308s are tims speciality - highest recommendations for all of SWFL if you check Florida region and search for Tim Stanford, all positive and outstanding reviews. 12 years Tim has taken care of my 1979 308 so I speak from experience