Maybe maybe not...depends on the overall condition not just new engines.
With saltwater boats, especially one that old, you have to watch the condition. Wiring and such can cause you lots of issues even with new engines.
My suggestion...spend the money on a good surveyor. They know what to look for and the slight cost could save you lots of headaches and heartaches. I don't think I'd ever buy a saltwater boat w/o a surveyor checking it out first.
12_3 lb Coleto Creek from kayak