keep the 1800 engine or put in a MP9 motor?

Madbrad

Newbie
Points
11
From
South Africa, Cape town
Car
Golf Mk1, 1800
Hey guys, so the question I have is do I keep my 1800 motor and mild tune it a bit for more speed or do I insert the MP9 motor. What would be more easier and of course less expensive?
 
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