Thanks I'll check it out. It sounds easier than taking out the dash. I'll let you know whay happens
I only had to remove lower decorative covers to expose and examine heater core for leaks. Removing right and middle dash fasteners was just to move out and up the dash about an inch in order to make room for heater core change.
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1983 S10 4WD carbed 2.8L automatic w A/C