My 2005 Fatboy had a Woods TW-6 (240 deg .510 lift) which I thought was stupid as that cam has a lower lift than stock, AND they had a 4 degree advance gear in there too. Exhaust was V&H Big Shots, .050 milled heads, and a no name forward facing K&n type air cleaner. It had decent bottom end torque, but was all done by 4800 rpm. Dyno showed 88rwhp. BARF!!! Next I installed V&H Pro Pipe 2 into 1s, ported and smoothed the inside of the cast aluminum air cleaner elbow, radiused the inside of the air cleaner element exit and the elbow tube, side gapped and indexed the plugs (Platinum+ Champions), it had fine wire platinum NGKs in it, (the fine wire plugs are for smog use and 50k mile longevity in my book and suck for performance). Not to make too long of a sentence there, did my standard mods to the V&H muffler for better flow (I have a flow bench), and the new dyno pull netted 102.3 rwhp and it pulled to 5400 rpm. Much better throttle response and gained 4-6 mpg too!
Now on to the good stuff... I then pulled the heads, ported them (remember I have a flow bench), installed 1.94" intake valves, did a 5 angle valve job, polished the chambers, installed a Zippers 54 mm T body and large port manifold (I opened up the runners to that size when I ported the heads), used a .030" head gasket, H-D 110" drop in jugs with Wiesco Forged flat top pistons, and a H-D 257 cam (252/260 duration and .569 lift).
Whew! We started that Monday afternoon at 1:30 and finished it by 3:00 Thursday afternoon. Also installed the Thunder Max self tuner with 2 wide band O2 sensors, it was everything that was advertised for it!
Dynoed at 127 rwhp! On pump gas (compression was set at 10.83 as cc'd. Throttle response is awesome, and I can light the rear tire anywhere in first, second and going into third for about 100-150 feet... Conservative driving nets 39-40 in town, and up tp 46+ on the road. No complaints here! Also forgot, we set the deck height at .005", as received it was right at .019". Remember these Screamin' Eagle heads are a true Hemi open chamber type and have no quench area at all except for a band about .150 wide as manufactured. Milling .050 from them widens the quench a bit as does the bigger bore cylinders too, you end up with a quench band of about ,290" wide. We also installed valve springs that accommodate up to .680" lift as I am still playing! Keep in mind that the valves WILL hit each other with this cam in these heads due to the valve angle, so you MUST angle cut the front of the exhaust valve for clearance! Don't be scared! We do that anyway to enhance exhaust flow!
I hope some of this info helps...
Modesty is a crutch for the incompetent!