Help! Engine Vibration

If I remember correctly the damper was a snug fit. I still have the original damper which I'm going to reinstall tomorrow. I replaced it because the rubber material was cracked. The balancer is a replacement 318/340 made by Dorman.

Reviewing the work done by the engine shop, the crankshaft was ground 20/20. There is no notation of balancing and the rods were two used replacements, no numbers anotated. I don't have any details on the pistons either. I think I got schooled at the engine shop, (engine rebuild kit, 8xhardened seats, 1xrepair sleeve, 2xused rods, vat. block and parts,7x bore block,1xinstall repir sleeve, install cam. bearing and freeze plugs,grind shaft020/020,8x R &R pistons, 6xhone size rods,2xvalve job,8x install hardened seats, 2x surace heads) total $1012.56.

Well see how things go tomorrow.