I like your enthusiasm!
Once you research 'em LS swaps don't seem to hard.
I'm sure you've gone to the LS swap section on the forum. Ton of info! If not, here it is:
http://67-72chevytrucks.com/vboard/f...play.php?f=206
ls1tech.com can be helpful as well.
Yes, you are probably going to have to swap gauges...but there are some pretty cool mods that were done here on the site to accommodate. (if memory serves, I believe Joedoh's last build he mocked up his own gauges.)