Quick question prior to ordering parts

[Grandavi]

Okay, so I look closer and try new things (still havent done the engine codes cause my father in law has my computer for that.. hehe. Is the 90 OBD1 or 2?)

Anyway, I started the car with the rad cap off. Coolant is in it, but not to the top of the rad. Immediately saw smoke coming out of the rad (I belieive it was exhaust). I think that pretty well signs me up for the BHG course.

I can buy a JDM 7MGTE for about 600-700 bucks with approx. 80k on it (turbo included) that has been leakdown tested, etc, or I can pull the engine apart and hope its just a simple gasket replacement.

Is it cheaper to do the swap? (I would do the labor myself with my 3 boys to teach em how to do it.. or how to screw it up depending.. lol)