I had a Glanza 1.3 turbo and the engines are brilliant and extremely tuneable if you know where to look for parts.

In standard guise they come with 130bhp at 0.65bar, mine was running a ported turbo, fuel cut defender, adjuatable actuator and uprated intercooler. That saw 157bhp at 1.1bar on a graph and it use to shit on Type-r and audi S3's.

I cant imagine it would actually be that difficult to put in a ka as the space is practically identical and the layout is virtually the same just some custom mounts and driveshafts and you'd be away.

Personally with £1000 you could have the engine and enough goodies for 150-160bhp and they are very reliable as long as you service them regularly.