The insides were baffled, with the close up nature of the bore scope and video camera it was hard to see other than small sections at a time. Unfortunately I did not take pictures as I was trying to get the car for fast track assembly for LOG 34 which it turns out I did not make due to the liner lift up and worn bearings.
I look at it as a good thing as it would have been tragic to have assembled the engine with the condition of those bearings. In my younger years I would have regarded the unforeseen items as bad luck and extra work, As a veteran owner I now look at it as fortunate discoveries and dodging potential disasters should the car have been assembled and driven on the road. Just like the defective tanks. Can you imagine the sinking feeling of someone spending the time and effort on the rebuilding the engine only to have the gas come leaking out and maybe a engine fire. So big thanks to Randy.
Exterior tops and sides of the tanks had just surface rust. Except for the bottoms the inside was in much better shape. The interior had light surface rust in spots probably due to moisture or condensation. The fuel pump well looked good. The bottoms were opened up, insides were media blasted, rewelded and sealed.
A good portion of the tank came off with the foam. I would say the bottom lost about 70-80% thickness and when wire brushed opened up 6-10 pin holes. It was that precarious.
So the funny part of the story. I remove the the tanks and take them the gas tank repair shop. I talk to the guy about what I want done to the tanks and show him the tanks in the back of my van and he says "hey Lotus Esprit tanks". Just about floors me when he said that. It turns out Cammack just had several tanks done, and Griese is in line right behind me with his tanks. So this small shop in Shakopee, MN has experience in refurb of Esprit fuel tank. Gave recommendations on getting the new fuel pump, strainer, etc.
Also did you see the pics of the SP300 frame stiffener and mounting bungs that Griese posted of the fabrication?