I just bought a 2001 Harley Heritage springer. Does anyone one know how to rebuild the front end with the new bushings?

It should but it all depends on the length of the neck. Measure the neck and the bearing tube that goes through the neck. If it;s long enough it should fit and you might have to replace the bearings.

Your engine is equipped with hydraulic tappets just like your car engine has. There is no way or need to adjust the valves. If you're hearing a slight tapping noise under the rocker box covers, this is normal. If you're hearing a loud tapping noise that comes and goes, it could be a roller on the end of a tappet going bad and you should have it looked into.

Good Luck
Steve

http://www.repairmanual.com/category/2003-harley-davidson-flstsi-heritage-springer-st/

Have the balance checked on the front tire, My heritage springer did the same thing and the front tire had slung the weight off of the front tire causing it to be unbalanced and bounce causing a vibration at speeds of 30mph on up.