Hi everyone! Im new to the forum. I bought my T-Maxx 3.3 used and am rebuilding the motor. My questions are should the connecting rod touch the crankcase here:

The con rod has wear marks on the bottom and the case is scratched up a little. Gonna replace rod, but didn't know if case was ok. Other question is should I change the head gasket or is it ok?

On my Galaxy S3