Chrysler Marine engines

A 1978 360 marine engine came up for sale recently and I was going to buy it -it supposedly was rebuilt not long ago and that got me to thinking-what kind of compression ratios did they have........it was definitely a 360 marine(special water pump and thermostat housing,etc...).
I passed on it because ,well,I don't have $$$ to spend on a chance. The guy wasn't keen on me pulling a head.....it was a recently running, he said.......