« Reply #3 on: December 20, 2016, 09:12:25 AM »
A company called Blue dot makes the best reproduction for early Mustangs that I know of.
...but NOT ALL APPLICATIONS. They do make a good quality reproduction for the 390 the O.P. is asking about but they do not for others. (such as 67 small blocks)
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Richard Urch
1967 (11/2/66, S.J.) GTA Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Int./Ext. Decor +many options
2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior, Roush Body Appointments