trannies (or transmissions for straight people) are the same, crossmember is the same, the flywheel, clutch, clutch fork, throw out bearing and throw out collar you want to keep together!
take your motor and trans out, take the trans off the motor take the clutch and flywheel off put them on the 1800 take the cutch fork collar and bearing out of the tans and put them on the 5 speed put the trans back on the motor slide the motor back into the car!
if you are fast maybe a 2 to 3 hour swap if you are ready and have the parts together!