What a project. But after completing the installation of the heater core and reassembling the entire dash (with only six or so screws left over ) The only thing I seem to be stumped on is the replacement of the factory audio amplifier. Before I get all the "since you're there why don't you's" I had to draw the line somewhere. If I kept replacing things while rebuilding the entire cooling system (which included two salvaged seats from a Land Rover and a pressure washed carpet) then I would have ended up with a new truck. I am still in the process of repainting the hood! So can anyone help with the placement of the amp? I am totally stumped. I have looked at the shop manual, but it is not the same as mine. I called Toyota and gave them my VIN and had them send me a copy of the placement for my truck and it is the same as the one in my manual. I have attached a photo of the one I have if anyone can help. I realize after uploading that it is not the best photo. The detail on the top (left) is not very clear. Let me know if another photo is necessary.