i just wanted to know im just about to put th ca18 motor in my 1200 ute the turbo needs a seal kit through it i heard u can put a sr20 turbo on the motor if u play with the manifold to suit. what can i do

The T25G fits on, but you'll find that the compressor outlet pipe is sticking in the wrong direction, so get the SR20 outlet pipe. The exhaust manifold side is a little different too, but easily fixed with a ratstail file.

Don't get a seal kit. unless you can get the kit and put the seals in for less than $300.
Not including removal/fitting labour.