damper question

the issue im having is I did a lot of things at once , and I pulled the engine again. I did the Wilcap 700r4 swap kit, a used crank bought from the internet. at around 1400 - 1800 rpm
have a vibration, grunt coming from engine its a weird feeling like it's elliptical .the Wilcap kit spacer they provide was not long enough , so had one made so now the torque converter sits in the end on the crank better. I had the crank balanced and I put new pistons again and balanced the rods. I drove it yesterday and its much better but still there. Tomorrow will hopefully have time to drive it . but never came across a engine vibration like that before. im going to disconnect torque converter and see if I can feel it.
and I also put another torque converter so its not that. The other used engine I have has a new balancer on it and I looked on rock auto and they list 2 models the better quality one and a cheaper one. well the cheaper one is on the engine now the better quality one I will swap out and try.
hopefully its that