1 friend had engine power problems
with the 82 --> dyno = 327
with the 88 --> dyno = 380 (with is normal with the car configuration)
the second had problems with the rev, with the 82, the car "cut" arround 4000 and more
after with the 88 .. no problem
to be honnest I do not understand why a simple thermostat can change something
but I prefer to be sure and remove 1 doubt so I change it