Near as I can tell (from block numbers), in my FJ40 I have a 1968 327 4bbl from a full size Chevy. I want to get ram horn exhaust manifolds as the headers that are on it at the moment create WAY to much engine compartment heat. I tried to buy some ram horns from EBAY but the seller was not sure about which ram horns to sell me for this engine. I think the seller was too concerned with getting the OEM manifolds for this engine. I really don't care about OEM. As long as they bolt up I will deal with the rest. What I need to know is, is there a difference in exhaust port spacing and bolt/stud pattern between 350s, 327s, etc? Any help would be greatly appreciated as I have the cruiser parked because the headers are melting the wiring.