Compression goes up; across the board;get a calculator and work it out. OTT for me but might be OK with the pros.

 

Cyclerama did one of their Ultimate Street builds on my 2005 fatboy. Also did Timken bearing modification and replaced tweaked Harley crank assy. with S&S welded and balanced racing assy. I ain't gonna bother with my impressive dyno #'s. Each dyno is different. I have outrun crotch rockets with this thing. Other Harley riders shy away from challenging me. Over 20,000 miles with NO problems. I have only changed spark plugs and oil. Downside is changing rear tire at almost each oil change. This thing runs like hell!

 

My bike has static comp of 9.8. It will turn over without pushing in the comp releases but more than once the starter has made a scruuunching sound that I knew wasn't good,so I always push them in before I start the bike.
As far as fuel I've been stuck using regular in a few nowhere towns and there was an audible ping,but I always have my homebrew of octane boost/upper cylinder lube so I have just gotten into the habit of adding 3 ounces per empty tank and I haven't heard a ping since.
My heads were shaved for compression. I'm very happy with the bike overall. It runs fantastic with not a single issue and gets 50mpg with 107hp/115tq. It's a 106 with tw6-6 cams.

 

That .570 S&S as Kirby mentioned, has been used here, more often.
Jim Kennedy of Matoon, Ill. recently tuned a clients 98"er with OE tbody, and Rinehart duals to 108/115, with our Stage II Heads.
No brag, just info.
Scott