Looks like an XE268H cam in it. Whatever bigger cam you choose will likely require different and dual springs.
I hope your rod caps are marked with the rod itself. Shouldn't do what you did. Take one rod out, put the cap on it with the nuts. No chance of mismatching them.
That one cylinder is really clean, popped a head gasket?
Might do a quick hone/fresh rings and put it back together.
All depends on how fat the wallet is on where you go with the process.