Heater Core
Drifting
Joined: Mar 2004
Posts: 1,873
Likes: 1
From: Savannah Ga
I was reading this in my 82 shop manual.Not sure if yours is the same but they want you to take out the glove box(NA in your case)remove the counsel all gagues.sounded like a pretty big project.Then again all GM's are pretty hard to do.
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
Team Owner
Joined: Aug 2000
Posts: 21,457
Likes: 463
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
We can help you better if we know it has A/C or not. Non-A/C cars can be done on the engine side without doing anything to the dash.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
With no a/c you can do it all from the firewall side, it is not hard to do or time consuming. Got my core from the local parts store although it took them 2 tries to get the right one. 
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