Most of those changes you listed can be done in a couple days or so if you take your time. then take it on a shakedown ride of about 20 miles to see how it operates under load. Not many touring frames other than custom jobs are as nice as that one. Its a tried and true platform use it as such and make it what you want.
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(Life is too short to play crappy guitars) 2006 Raleigh Cadent 3.0, 1977 Schwinn Volare, 2010 Windsor tourist. ( I didn't fall , I attacked the floor)