This whole conversation seems to be getting no where.
A properly built and warmed up 13B will last just as long as any thing else.
Mates of mine built a 13 B PP which was fitted to their Stanza autocross car.
Any how, this car/engine has lasted over 6 years of abuse, on dirt, and track work.
What is abuse you say.
Lets see any nissan engine, have 4 rough blokes using it non stop all day.
One has a go, next gets in, then the next then the next.
By the time all 4 have had thier turn, the next course is set, and it is back on again.
Most events are over 6 hours long, and the car never gets a chance to even be turned off.
Yes every event it gets seviced , new oil, only ever has ultimate 98 with a splash of redline 2 stroke oil in the tank ect ect.
Any how, this engine was made out of a pile of 13B engine bits they had lying around, just fitted new seals to the best bits they could find at the time.
I wouldn't say I would ever drop one into a Dastun 1600 though but that is my choice.
Another engine to look into if you want a cheaper non nissan engine, that is twin cam, fuel injected, turbo, or non turbo, very strong in my eyes you could not beat a Mitsubishi 4g64 twin cam out of a front wheel drive Galant 1989 era, small amount of work, and mitsubishis original 4g single cam? gearbox out of import turbo (mental blank
) two door sigma looking thing 
when I remember what is was called I will edit my post 
will turn it into right wheel drive configuration, new exhaust manifild, and a computer, friend used a link in 1991 and the thing was unstopable, (was still going hard in 2003 used daily) and made great HP This was fitted to a old Galant station wagon, and was removed to do paint the car, but owner lost interest, but we could go into his kitchen (yes kitchen) take the engine into the shed, bolt her back in, and thrash it for another 10 years if we wish.
Any how, I believe non nissan transplants in a 1600 is sacriligious, but hea, do what you wish with your car.
I just wouldn't do it.