There is a machined pad on the engine block ahead of the passenger's side cylinder head. Scrape the paint away and try to read the stamped numbers and letters. The letters at the end of the sequence can be run through an engine code list to identify the cubic inch displacement and year of manufacture, and sometimes the horsepower rating. The triangles on the end of the cylinder head would indicate they're the "power pack" high-compression heads used on early 283's, but those heads will bolt on to any pre-1991 small block V-8.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!