I too am looking at 'cooling my ZD30. Thinking of going the water-air route, as:
1.Don't want to chop my pretty bonnet.
2. Found with air-air setup, that it didn't really benefit when taking off at lights etc, mostly beneficial out on the open road, once the air flowed through it.
I've seen the PWR barrel setups for $430, which is pretty good value I reckon. Also seen combined trans cooler and thermo fan for $300.
I reckon you could have the pump, hoses and bits and still come in under $1200 all fitted.
Has anyone hear done water to air setups?
By the way, for those who are set on a top mount air-air setup, maybe look at a standard Subaru WRX cooler. They are a good flowing core, is compact, and has the outlets in the right spot for a ZD30 from memory.
I fitted a WRX STi/ Liberty B4 twin ilnet 'cooler to my Surf, and it worked well, but needed a bodylift to fit it properly.....
Cheers,
Pat