i assume you mean this head has a kidney shaped combustion chamber? if so this is the lean-burn head fitted to fiestas and escort carb models in the mid 80s to early 90s unleaded too. the full hemi heads were rst or early pre86 cvh with domed pistons. also as far as i know all late EFI cvhs had hemi heads and domed pistons. the lean-burn head can be a goodun for tuning, but only of use if you have the pistons to match it.