Course you could. Its 125bhp per litre, no more highly tuned than a 250bhp Cossie.

It seems that the turbos are similar to EscCos and Rover Turbo T25s (identical compressor housings) and they good for about 250 real brake each, so doubt there much leeway in the turbos.

But if we talking swapping turbos and changing intenrals, 2000bhp+ shouldnt be out the question unless the block is really weak.