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I've got a '77 280Z driver and an '81ZX parts car. The '77 has 70K miles on it. The '81 has 104k. But, runs much better. I'd like to swap motors but don't have the time, money, or space. Would I be able to swap everything but the blocks? You know, injectors, plumbing, cold start valve, etc. Any help would be appreciated.
 

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> I've got a '77 280Z driver and an '81ZX
> parts car. The '77 has 70K miles on it. The
> '81 has 104k. But, runs much better. I'd
> like to swap motors but don't have the time,
> money, or space. Would I be able to swap
> everything but the blocks? You know,
> injectors, plumbing, cold start valve, etc.
> Any help would be appreciated.

If I were you, I would try to figure out why the 77 isnt running well. There are many similarities between the 77 and 81, however, there are many differences. The 81 motor has a different cylinder head and pistons. It also has a slightly different fuel injection system. This system utilizes an O2 sensor to help with the air/fuel ratio during idle and part throttle. The injectors are the same, unless it is a turbo. If you are parting out the 81, and you want to put some of its parts on the 77, start with the injectors. The 77's may be dirty. Also check the catalytic converter, as they somtimes go bad. Also check your fuel pressure, those fuel pumps don't last forever. I have had (3) 77 280's over the years and all of them idled rough. I believe that it is just inherent in those early fuel injection systems. They are a batch fire system so some roughness is normal. If you would like more info, let me know more of what the 77 is doing. Good luck!
 
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