i bought a 1984 z28 camaro last week and he said it had an lt1 engine in it but i looked it up and they didnt put lt1's in that year!!

--how do i find out if there was an lt1 put in my camaro?
-- oh yeah he said the engine was rebuilt they could have just put a whole new engine in it but how could i find out?

--thank you for your time and suggestions ...cody b