Need help with vibration!!

I watched the drive shaft get balanced, it was out by few grams , new u joints last year (less than 100 miles on everything) rms suspension frees up lot of space, no broken mount, I assume has to be something with that crank balancing and my flywheel. Also my 8 3/4 was just torn apart and checked and everything is good. Like I said last year with the 340 had no vibration at all, now I do. So for me that rules out the drivetrain besides motor for most part. I'm scared to try to bring motor up over 3500 to be honest.