If you're keeping the Renix electronics, which is easier, you'll need to swap every sensor from the 90 engine onto the 92. You should also use the 90's fuel injectors, and you will need its alternator too. If you are also going to use the new transmission, you will need to use the 90's flexplate, as the 90 crank sensor will not properly read the 92 flexplate, and it will not start. The Renix TPS needs to be adapted to fit on the HO throttle body. There is an adaptor available, i believe from Hesco, that does this. I made the adaptor myself, and there is probably pictures of it on here somewhere. To avoid the hassle of adapting the TPS, you could use the entire TB/intake manifold from the older engine. The Renix TB will not fit onto the HO intake. swapping the intake/TB/fuelrail and injectors would probably be easiest. Chances are there is a hole in the block already for the knock sensor, but you may have to tap it. good luck.