340 vibrates

It started with my reverse servo breaking and I pulled the engine at the same time I pulled the trans. Dropped the engine pan and found badly worn bearings and some grooves in the crank. Had the crank turned and all bearings replaced. Also had the cylinders honed and replaced the rings. Had the rods overhauled and had the rotating assembly balanced. Machine shop assembled the short block. The vibration was there before I had the motor gone through and really hasnt changed since the rebuild. I have driven it since the rebuild and it is the same as before. Thought it could be tire balance or drive line but the drive line is out of it right now and it is still there. Don't think it is a lean carb, had a wide band tester on it last summer while I got the carb dialed in. Same converter as before, just had it re stalled and cleaned since the trans failed. Upgraded the flex plate from the smaller factory one.