What engine did the 1974 nova come with I'm thinking of buying on but it has a spent 6cyl in it but have a chance to get a 350 was wondering how hard it would be to change them?

The novas had two type of engines, If I remember the one for yours might be a 350, I had a nova '68 , had a 307 short block in it, but a old friend had a nova 2 dr coup which had a 350 in it back in the year of 1978.