I have a 76 wagon with an almost perfect body, engine a little tired, a friend has an 84 with an excellent motor...how difficult would it be to transplant the 84 engine into the 76?

thanks in advance for any and all ideas,

Kris

I did a very similar swap, except with turbo motors. You will have an issue with the injectors. I just made a bracket to hold the injectors in the B23 holes and they worked fine. A trip to the hardware store for different o rings will be required. There are also not enough holes in the B23 for all the Kjet sensors. I got by with the minimum. The CIS temp sensor, And the cold start switch was clamped to a heater tube on the back of the engine. I then put a switch on the dash for the Lamda temp switch. When the engine was cold I just flipped the switch and left it on for a couple of minutes. Now that I think of it the intake manifold is different with the NA models making it hard to use the K jet.
Are you able to swap the FI along with the engine?

I would prefer swapping in the fuel injection system also but I seem to remember doing something very similar and I swapped out the entire fuel system ; lines and pumps etc. Maybe I wait for a B21 to show up somewhere.

Kris

Save yourself the aggravation and just start using Lucas Oil Stabilizer at each and every oil change. It'll turn the previously "little tired" engine into a racehorse.