A proper balance shaft elim kit will have a short chain, a short spud shaft to replace the exhaust side BS, and a blank ring bearing to block the oil hole in the intake side BS front bearing hole and a new oil pump sprocket. The crank sprocket is usually a little loose on the crank. There is one guide used for the short chain, the bottom one, and you should oval out the more central bolt hole a little so you can adjust the tension of the short chain.

I would pull the rocker shafts to check the cam bearing bores for scoring and metal, as that's the quickest way to check for migrating metal in the motor. Since you are already in so deep, I'd also pull a couple of main bearing caps and check there, too, which means you have to pull the pan, which is not a bad idea, as you probably tore the pan gasket when you pulled the timing cover. You can drop the front diff supports at one end to rotate it down to get clearance to pull the pan, and may have to pull the front crossmember.

If all that is good, I'd do the bse and let it fly.