i tossed this to the guys on py in the race tech section. check out the post. the votes are to deck the block so far. nearly 90% say go for it as not many cons to this work being done other than the fact you may choose to run RA equipment which you would need a taller deck to do so with. post as follows:

http://forums.performanceyears.com/forums/showthread.php?t=536239

hope it helps a bit vikki. also you haven't really told us what your symptoms are. you've asked the point of decking the block but haven't told us why you are considering it in the first place. like we all do with the newbies, whats the symptoms and the goal?

andy