92 Z28 heater core replacement

Has any one done one of these? If so I sure would like some input. I am not usually afraid of the unknow but this one has me thinking I might have bitten off more than I can chew. 305 TPI auto AC Jim

I had a 91 and it wasn't that bad, just an uncomfortable feeling on your back from having to be in a weird position. Just have to figure out where all the little bolts on that hold the cover that's all. A lot of times the plastic tube breaks at the end going into the heater core. A little longer hose might save the heater core from being replaced.