I have a 91 626 with a 2.2 non turbo, manual trans. I reacently got my hands on a 88 626 2.2 turbo with manual trans. the car itself had been hit hard in the right front corner so it is totaled. I drove it to my house and was very suprised at how much more power and snap it has. After some resurch I found that the engine harness in the 88 and the 91 were the same. The fuel pump is the same. The only difference was the computer. The trans is built stronger in the turbo. It comes with stronger axles as well. You don't have to use the trans or axles but they are definatly stronger from a turbo. In short if you can find a turbo 2.2 mazda or probe, In all my resurch I found that it is a straight swap, A major horse power increase, and defently a great lot of fun. If you are into major modifications then the v-tec engine is a good choice. Never done it but could be interesting.......... good luck
Gos
P.S. I have a 88 mazda 626 hatch back parts car if anyone needs parts. You can send me an e-mail for more info. I'm on the Oregon coast.
gosamer2@yahoo.com