Is it possible to put ZTEC Head on 3rd gen short block? Do the 3rd gen SOHC and ZTEC share the same block? What's the difference? Different bore and stroke? Different crank? I notice that the ZTEC's have higher RPMS at same speed in high gear. I have 99 Tracer. It would be simpler to swap head than engines. Is DOHC head belt or chain drive. I can imagine some mounting points for tensioner, etc may be different.