Ed, where can you buy a generic HAI hose? Is it basically the same thing (spiral metallic wound) or is it something like a rubber hose from an auto parts store?
Sorry I missed this. Yes, it's a generic spiral metallic job from All Parts.
On a FJ60 (I know, not a FJ40) the HAI flapper valve in the air cleaner neck is controlled by the Hot Idle Control Valve (HIC) located inside the 2F air cleaner cover. The HIC very slowly opens and closes the HAI valve attempting to regulate the air temp going to the carb between 81º and 91º F.
In 1986, this was Toyota's best solution for supplying the optimum air temp to the carb for what they wanted to do.
I have this version of the air cleaner on my '76. It probably came from the donor of the long block after the PO ran the original out of oil.