Check out this earlier thread about the Revell/Monogram 1/24 Huey.
http://www.finescale.com/fsm/community/forum/topic.asp?TOPIC_ID=36489
Basically, it is a pretty old kit and lacks detail and has oversized parts. There are no aftermarket update sets for it. Better bet is to build one of the MRC/Academy 1/35 UH-1Cs. Great kits and loaded with detail. Or, for a UH-1D/H, the Panda 1/35 one or the even better Revell 1/32 model.
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