It is the opposite. The V35A is a very compact engine for its output. This allows the LS500 to be FMR. The whole assembly is smaller than the multistage hybrid system which itself is smaller than the 2UR+10AT. It's the 2UR that's too big for the original 3IS since 90 degree V8s are very wide. There is no DOHC V8 that's smaller than V6.I'm actually thinking a detuned 5L v8...ive read/heard that the 3.5L TTV6 is a massive engine and barely fits the LS along with its 10speed auto. At least with the v8 we know that the platform can already take it along with the 8 speed auto. But I dunno. Either way is good. So long there is a model sitting about the 350!