something really needs to be put into the tech section on this... it gets asked nearly every week... Here's what i've collected from various sources.

Modified Engine cross member. $200

New gearbox cross member - Need to cut the old mounts out. $50. ->$0

Modify the transmission tunnell - I used a scissor jack then cut & welded to suit the CA18 box. Material.... Say $20. ->$0

Disc brake front end conversion - I went for SR20 disc's on 120Y springs. $450.

New battery box mount - Need to cut the existing engine bay battery mount out. Space! Material & welding rods... Approx. $30.

Diff conversion - I went for a R31 Skyline LSD, but just about anything will fit with engineering. $180 from wreckers + $500 to shorten + $500 to rebuild.
Alternatively - You can use the stock diff, but you'll have to nurse it with the CA.

Tailshaft - Stanza 1 peice are easiest. They need shortening, but have the right bolt pattern. $45 from wreckers + $400 to cut & turn.

Fuel Tank - You will either need a surge tank on the existing datto item which is a bit small, or an integrated fuel tank / surge tank. I used a R31 item..... Fits like it was made for it - You mount this behind the rear axle & the empty space where you remove the stock tank is ideal for a battery mount. $60 from wreckers + $80 for RHS & bolts to mount.

Hydraulic clutch conversion - Use Pintara hyd. clutch ass'y & mount to the firewall. $40.

Extended fuel tank filler & wiring - Roughly $150.

Radiator - I used an SR20 item. $120 from wreckers.

Intercooler - You can just a 65mm item sandwiched in between the radiator & the grill. $600 - $1000. ->$200, bought

Intercooler plumbing - Looking at roughly $200.

Exhaust - Looking at roughly $1000.

Engine + Gearbox - Depending on availability & condition you can expect to spend between $2000 & $4000 - Make sure you get the computer & pollution gear + all other bits & peices.

Wheels & tyres - I used 14" skyline steelies & got out of it for $450, but you could easy spend $3 - $4K of flashy 15 inchers. ->second hand etc. $500-$1000 plus rubber

Speedo / Tacho conversion - I'm using a refurbished 1200 dash with Autometer guages $350. -> custom, gauges ~$220

Total = $9405

O.K so that's rough costs for changes you'll NEED to make..... As someone else stated, some of these parts are getting harder to find so more $$$.
Of course this pricing doesn't included labour.... I'm lucky that I can do it all myself. I shudder to think if I had to pay someone.

Haven't included paint & panel costs.

Hope this helps.

Cheers,

Coops

D A T T O:
did my CA conversion in my 1600 for under $3500

Engine box, loom, ecu. $1100 - private seller.
conversion kit - $770 - stewart wilkins
exhaust - $750 - Kirrawee mufflers full 3 inch no cat
cooler and piping - $260- just jap for the cooler and silicone bends - exhaust shop for pipe.
surge tank and pump - $200 tanks from stewart wilkins, pump from private seller.
thermo fan - $120 - auto one menai.
boost guage - $30 repco
turbo timer - $50 just jap

ok 1200 fans. i've decided to start a conversion, not into my ute but into a sedan i'm about to buy. if someone could PLEASE jot down a check list of everything that needs to be done (not price list etc) to wack the CA in. It's already got the auto trans tunnel so don't include that. cheers.