The 13B from the 1987 is Different from the one in the 1991 would it be more cost effective for me to buy a new or used 1991 or convert the 1987 that I already have?

Josh

 

What?

I don't understand what you're trying to accomplish. What year is your car?

 

except the compression and rotor weight

the main difference is EGR valve

89-91 doesnt have it

also the EGR port under the primary port is different and wont line up with the intake.

you can make the engine run, no problem, but you might have issues passing emissions.

 

The motor is a 1987 I wan't to put it in a 1991 converible