I thought these were for a hot air, I sold them as such, but the purchaser said they are for an intercooled... I took them back but I have verified what they are again...
They are Hooker headers for an '86/ '87 I/C car. (It looks like Hooker headers copied the early Kenne-bell design)
You need the right combo because they have larger primaries and spool a little slow otherwise.
They probably work good on an 8 sec car.??