Also, QuietRide in Stockton calif sell a variety of precut kits of sound deadening and heat shielding products for these cars. Both invisible under carpet stuff, doors, and and visible like trunk and hood insulation.
They had several F85 models to make templates from. I used their PVC firewall insulation piece and it fit great.
I had no insulation or carpet or padding left in this car thanks to 40 years in a barn with the usual suspects crawling around borrowing or using material for nests.