Hi James, I've bought a few cheap E bay glue bombs in my day. Most of the old models of the 70's and 80's were built with the testors single stage adhesive model glue, it melted the parts together on contact... so the more glue used... the more area of potential contact... the more painful it will be to separate the parts ! The only way to reliably separate the parts if they are well glued.. or super glued.. is to use a super sharp long point X-acto blade and surgically cut through the bond. Hot water could offer a small advantage to soften things but I would not be confident in handling a 45 year old piece of plastic after being heat soaked. Surgical separation is a lot of bloody work.. but its worth it when you save an old kit.. and your kit in new condition would be 300 or so dollars US.... or 425 or me in Canada. I will see about taking pictures of the mirrors on one of my 4070A trucks...For new replacement pieces for my old ERTL International tractors, dump trucks, mixers etc.. I will buy a cheap IH 4300 transtar kit for 35 dollars and kit bash it as needed. Best of luck in your progress, and I will see about a close up pic of the mirrors. Cheers. JIM