You should be able to do a 20 valve 4age swap, that's only to 1.6 though..
Most people with these just drop the startlet turbo motor in (4efte)
it's only 1.3 but with minor miods can see 200hp with ease. I think you can keep your gearbox too, not 100% sure on that though.
those are your two easiest options, with number two being easier than number one.
both will cost a bit of money.
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