The 3SGTE motor is completely different from the 4AGE or 3A motor, simple answer is no.
If its a Turbo its a R154
next to the transmission
You have to more specific, is it a turbo or non turbo motor?
The automatic transmission in the 1991 Chevrolet Cavalier is the Turbo-Hydramatic 125, and was later renamed the 3T40. It is an automatic 3-speed used in similar j-body cars of the time. Source: http://en.wikipedia.org/wiki/Turbo-Hydramatic_125
Transmission, yes Motor no, but it would be easier if it was out.
Yes much trouble. The motor mounts are not the same as well as the axels. It would be easier for you to convert the 420a engine to a turbo modified. They make turbos kits for the 420a
NO
I have a 94' Q45 motor and transmission in my 1991 Q45 - so the answer is "probably".
BF230FT 2.3L 4 Cyl w/ Mitsubishi or garret turbocharger.
It goes in where your dipstick is in the back of motor compartment
take out the halfshafts pull the motor and unbolt the tranny
yes... its should be the 4EAT-F transmission...for both motor types