When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I assume by your title that you are working on an 1980.
There is no real easy way just lie on your back with a flashlight and reach up there or you can also remove the heater duct work from that side for more acces.