strait 6 in my 280zx

ok...i've got an 81 280zx....the guy before me put a brand new engine in it...its a strait 6 nissan engine...but i dont know what car its from or how much hp its gots...i was just wondering if u guys knew wuts nissans have a strait 6. i think it might be a 300ZX, but i'm not sure.

good

all of the Z's came with a straight 6, except for the 300zx and the 350z, its probably a 2.8L cuz they are pretty plentiful and im not sure if a 260 or 240 z motor will fit the tranny etc... it MAY be a datsun maxima engine though, but it wouldnt matter because its the same thing