Will a 95 LS motor and tranny fit into a 90 GS Integra and is it a direct bolt in?

 

It should fit no problem. Any good mechanic can do the swap easilly. The ECU is an issue. OBD1 on the 95 and non OBD on the 90. You will probably have to use a converter in order for it to work. The transmissions are also different. The 90 being a cable clutch and the 95 uses a hydraulic clutch. It might be easier to find a 90-93 transmission or just use the one you have if yours is manual. It should bolt right onto the block.

 

i just did a 94 motor in to my 90 ls. The wiring harness are different. motor mount's. sensor's in differnet place's. exhaust manifold was different. But all in all it wasn't too hard i just finished putting the motor in friday.