i feel your pain, i did mine at the start of winter and it was down for about a month because i did a little at a time between working and sleeping when it wasn't too cold or raining. good thing i have another vehicle or i would have had to brave the weather and the frozen hands and get it done in a day. i took my steering column out and that made it a lot easier, and i didn't disconnect the ac lines either, i just took the evaporator case loose and pulled the ac lines through the firewall as far as they would go and like you said, getting that heater core out was like trying to squeeze one of our trucks through one of those lazer wash carwashes. total time for me was somewhere between 7 and 10 hours total. i had to take the edges of my original dash and glue them back together so my dash cover would sit at the right height. that thing had the break strength of a dorito, looks good now though, and i have heat without the foggy windows so i can't complain.