Hi I am doing a swap from a 99sc300 2jz non turbo to my sons 86.5 supra.The 7mg engine was smoking bad,the cylinders were scored as i discovered on the last head gasket replacement. Couldn't pass up the sc drive train for one benz sl500 radiator recore. engine and trans swapped now the wiring.whats recommended I've read several different blogs including use the 7mg ecm. Help!!