What is the specific horsepower of a 1963 283 bored 060 over?
There is no honest way to determine the HP of an engine without
knowing the specifics. The camshaft specs, the cylinder head specs
(ported? Valve sizes? Valve springs? ) , the piston type (flat top,
dome, dish, etc) etc. They can range from 150 HP to as much as 400,
though the 400 would take an incredible amount of money. I know
this is an old question, but the SA answer that was previously here