installing 883 I have 440source flywheel question

If the balance is off, you're going to feel it. Trust me. McLeod lists three different weights for their flywheels (besides neutral). If you check their flywheel part numbers, there is a suffix code. It's going to list for a 360, 440 cast crank and 440 sixpack. Get the right weight and put in in the correct position. (I'm pretty sure the 440 Source flywheel is a copy of the McLeod).