What error codes have you been getting?
Unfortunately you won't be able to correctly identify good from bad with a simple cycler charger. Yes it will wake them up and restore some capacity (by removing memory effects) but it won't test for current capability or self discharge rate.
There are a number of important factors in battery deterioration and assessment for reuse.
I suggest you read up on the carbon pile tester thread. That's a good starter for ten.
The correct kit to cycle sticks, and test them thoroughly will take some investment of money and a lot of investment of your time. It's a slow tedious process. Then you need access to some spare sticks tested in the same way so you can pick the best 20 and use them to rebuild your pack.
IMHO ranked in importance for a car with no mods or charger. The battery specs you need to be testing and working with are.
1) Stick ability to deliver at least 90A for 10 seconds at 20C temp at >0.9V cell average without excess heating.
2) Stick Self discharge rate < 1ah per week
3) Stick Capacity as tested by superbrain at 6-10A or equivalent of at least 5ah
You might have to compromise here and there but.
If you use sticks with high/varying self discharge rate then you need a grid charger to correct it at regular intervals.
Good luck and keep us updated.