Heater Core Question

I need to replace the heater core in my 95 C-1500 (350) and was wondering if it's a pretty easy job. I have my Chilton manual but it's not to detailed so I thought I'd ask here before going up under the dash taking things apart. If someone has some detailed instructions please send them my way.

Never done one on that year, but the late '80s were a pain in the ass. You will probably need two people when it comes to going back together (had to disassemble the HVAC box, and nothing lined back up without force).