Most CA18DET need full rebuilds and datsport kit
or similar so can cost abit.
Have you thought about a Z18ET with full counterweighed
L20B crank, supposedly they fit straight in as the Z18
has the bigger journals to accept the L20b crankshaft.
Its a better looking engine for the year of the car and
there is a member with a 120y making over 200hp atw with
one and looks better than most due to less ricey looks.
You can also do the same engine but with L18 or L20B
bottom end to avoid pollution gear if you get the pre-75
model engines which most likely only allows L18 engine.
No pollution gear keeps with the retro theme