I forgot about that, all the cars i've done it to have oil temp fittings in the sump, and decent oil pressure gauges. The RB26 has a oil pressure sensor the same place as the RB30, but it has an additional oil pressure switch (for the light) on the sammich plate. Cause the sump is so thick in a 26, you can just drill and tap the sump to fit the oil temp sensor (sump has to come off), I did it to a 26 without any problems.