the 2.2 trans will not bolt up to the 4.3, if you use a carb on the 4.3 it is not that hard of a swap if not you will need the harness. a trans off a 350 will bolt up to the 4.3 and you will have to get a drive shaft lengthened of find a 4.3 truck to get one from. you will also need a set of motor mounts