Not so fast......
Yo MeloPark
I have a 70 240 with a 83 Zx turbo radiator in it. The hood latches shut just fine, and the Zx radiator fits perfectly square with at least 3/4 inch clearance at both sides, and the radiator's bottom does not stick below the 'wall' of the front lower radiator support. You will have to relocate the mounting bolt holes however to use a Zx in any earlier model Z car. Perhaps this was what you were refering to as you thought ' not working'....????? shane-