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ok if it works or not putting a head off a smaller anything isnt gonna make more power you see alot of people take the toyota 22R and put the 20R head on it. yea it might make a half or even a full point more compression but what you might gain there you will loose in the flow of the head it will simply not flow as much air. i know some one is thinkin right now "what if you port the little head and then you gain the compression and it flows just as good" my answer why dont you take the bigger head and put it on the smaller engine and turbo or supercharge it then you might have something. it sounds to me like you are kind've in a crunch if it was me i would bolt the head on if it bolts on, then turn the the motor with a wrench and check piston to valve clearance and if thats all good calculate the exact compression ratio and if you arent over about 10.5:1 you will be able to run good pump gas i would drive it like that but only for temporary until you get a new head.
rep. the MK1 and the D.I.
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