Slow 6 more power

I have the 225 .Not looking to do anything crazy just a little more power. It has been 3rd built once in its hole life so it's not bored over and only about 10 thousand miles on that rebuild as of now. Any web links would be helpful.
Welcome to FABO Got6, spend a little time paging back through this forum, this has been discussed over & over & over...................................then get ready for the
usual "chuck a V-8 in it" posts. All the basics for a decent bump in motivation have been covered here, and it's always a good trip to .org, have fun!!!