Does 5.7L have 243 heads? Is that the right heads for this size engine?
When I slide the control lever for temperature I don’t get any heat. If I slide mode lever to A/C I can hear the clutch kick in, but fan stops! I switch back to vent and the fan will go back to high. Even without the fan I don’t get any cool air coming in. I had replaced the entire temp. control assy. as the controls in the back were broke and it was stuck on heat. What is wrong??