looper heads 3318108 what cc??

[roadkill636]

just wondering what cc heads these may be,what kind of conpresion shouldIbe having? are they any good for a 2500# fishn boat?

[jphii]

Somewhere around 58cc I think. Fine for a fishin bote, 93 octane.

[roadkill636]

are these the only heads avalable on a 86 gt?