DCW242;120578 wroteIs your car an 86+ model? All 86+ 240s with LH2.2 already have the speed sensor in the diff, and the wiring to the cluster. You just need to fit the later cluster, or there is an output on the earlier cluster for cruise control, the 2.4 ecu can be connected to that as well.
Right, will be going in an 88. And you're right about the speed sensor but is there not different sensor types between 2.2 and 2.4? Or do they all read the same?