nats and non nats

as you may know aive wrote my red micra off big time so ive stripped it down taken then engine ot and low and behold got anther micra for my 18th birthday that all my mate brought me a one litre but am whatning to put my 1.3 but this new one has nats and my engine hasnt may be a stupid question will it be ok to just plonk it in ?
 
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