The PO of my 89 FJ62 installed a long-range gas tank (40 gal). He also installed an aftermarket exhaust system that snaked away from the side of the gas tank by about 1”. I’m installing a new exhaust system with brackets in the “original” positions. The exhaust pipe ends up running about 1/4” from the side of this large tank. Is this too close to the tank? If so, is there a heat shield/insulation wrap that I could wrap around the exhaust that would be effective? Thanks.