heater core replacement with A/C
I am looking to replace my heater core on a 97 D90 with A/C. I have searched the threads and in the FAQ but cannot find anything on trucks with A/C. I cannot locate the upper or lower bolts mentioned in the FAQ section. It appears that my rivets have been replaced with screws, I looked at removing the core while in place but it doesn't look that it will clear the above sill. Any help would be much appreciated, thanks in advance.