Off the top of my head........
Modified Engine cross member. $200
New gearbox cross member - Need to cut the old mounts out. $50.
Modify the transmission tunnell - I used a scissor jack then cut & welded to suit the CA18 box. Material.... Say $20.
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.
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.
Speedo / Tacho conversion - I'm using a refurbished 1200 dash with Autometer guages $350.
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.