Get on the TBI forum, and do a search for TBI mods.
Get on the Bcar & Impala SS forums:
http://www.impalasuperstore.com/naisso/Forum2005/ http://impalassforum.com/
and search there too. You'll get more info if you search/read in all three places because you're asking another very general question that's been answered many times before... so it's not that likely you'll get detailed answers until AFTER you read. Plus, the needs of a 4100 lb Caprice are a little different than on a 3400 lb Fcar, so you don't want to do the same exact mods as done here because you don't want to give up much torque (especially with the 305). HTH.