69 L88 Corvettes didn't have fan shrouds and may have been radio delete cars without ignition shielding too. The center console should have a plate telling what engine was original to the Vette. All of those things could have been changed over the years though. As I recall there is a difference in 69 L88 radiator support, probably didn't have holes to mount the fan shroud, but can't give you the exact specifics though. Here's a dandy article on one for you.
http://www.corvettefever.com/feature...tte/index.html