Can you replace rod bearings with engine still in car?

Yes it can be done. Motor has to be lifted up maybe 2",centrelink is in the way so get it out. You will of course need to put the vehicle up on jackstands and drain the pain.

If you still have an engine to trans brace,take the driver side brace out.

If you have a Y pipe on your exhaust it will need to be cut out.

Oh first remove the dipstick and disconnect the batt.

Then it's just a matter of replacing the bearings.