its the intake manifold that wont fit under the bonnet of the astina, as the engine dimensions are identical, from memory.
hardtops have a bit more space in regards to bonnet clearance than the hatch, but there's still not enough room.
also
KL-03 - the 2.5 as fitted in the MX6/probe (australian delivered)
KL-ZE - the 2.5 fitted to some Jap MX6 - with 200hp as standard
and the eunos 500 has the KF, not the KL