And you did it in a uniform pattern, tightening little by little?
Call around your area for machine shops or automotive shops. I happened across a driveshaft and clutch manufacturer in my area who was willing to take the assembly from me and balance it. It was more of a check to find out if there was a certain combination of fitment that made everything IN harmony instead of having a vibration. Just make sure they know it needs to have a 50oz counter weight to it. They didn't actually balance my assembly but rather found the reason it was vibrating.
Getting them balanced together should take those out of the equation, make sure you know what way they were assembled during the balance too.
It might not hurt to check the balance on the flywheel separate too just to be sure that it is ok, in the event that you replace a clutch you won't have to go through this again.
1994 Mustang GT TKO 500 5 spd
Fox 75mm TB, FTI Ported Edelbrock Perf RPM, 58cc AFR 165s, FTI Cam, 4.10s, Drag Susp, PMS Tuned by Mike Post
316 RWHP & 335 RWTQ // 3,225 lbs with driver and fuel // 11.919 @ 113.92 All Motor