Hey guys became a member ages ago then kinda fell off the map but now I'm back and I'm starting to think of a ca in my 1000 ute would any of you know if a ca16 will bolt up to a ca18 rwd gearbox ? 
I know just about everything else is the same I'm thinking ca16det should be relatively cheap build as ca18 stuff is still fairly redaly available. 
Any help / ideas would be greatly appreciated cheers Aaron.

A few people have done it now, even a race car. all things, gearboxes etc between a ca16 and ca18 interchange, they fit nicely, little room left over but quite a compact motor once the sump is sorted to go over the crossmember.
 
You have to consider the following too for engineering
 
column for steering needs to be adjustable so need another column
brakes upgraded
body should not flex beyond a certain point
emissions must be retained (very messy)
cat converter also must be used
and a few other things Ive missed but unless its a race car
the CA is not a clean looking install compared to a twin cam
Mazda head on a bored out A15 which skips most things above
but needs a good box to handle the power

emissions is quite a challenge with the CA18DET theres quite alot of plumbing and sensors everywhere
 
In the UK the 8v sohc head with boost make more torque than the det
powerwise the det has a 5-10% advantage over 6000rpm
 
not much in it but something to consider as with forced induction even 8v head like the ca20e
can flow and make excellent tq and hp. The inlet valves on the sohc head are 42mm inlets
and 35mm exhaust very close to the L series.

Either way we have options gallore
 
is there another pic of that supercharged setup?
looks nice! the other option would be to feed that charger with a sidedraft carb of some kind
like an SU carb or couple of bike carbs

This is the other option lol

nice looking setup! and found you a buyer above