The 58 Merc had a 383" MEL and had a 3x2 carb option. I think the 59 also had the 383. And if my feeble ol' memory serves they also were used in marine applications. Some of the Christ-Craft, Tollycraft Owens and others too numerous to remember used or had access to The MEL engine by Eaton, the same co. that used the "Interceptor" trade name. They also used alot of FEs from 352s to 427s and everything in between as Interceptors.
60 Starliner-- 61 Starliner-- 66 Galaxie-- 67 Fairlane GTA-- 66 Fairlane GTA-- 69 Ford F250 and 3 Ford powered hot boats