Question on piston and rod balancing

You may be looking for one of us to say send it, like the Chevy guys who will go to the scrap yard and grab another core for $150 to destroy. I will caution you on this. It needs to come apart and go back for full balance. Will it run like it is, sure, but even a grocery getter will wear bearing surfaces unevenly and vibrate. You need crank, rods, pistons, balancer, and flexplate to do it right. Plus or minus flexplate. More so for externally balanced small block stuff. I had $1800 in machine work, balance, heads on my last 440. Yes it will cost money, but a new motor is $6500. And my advice and $5 will get you coffee. Good luck