Point blank, NO supercharged Jag came with VVT. Even now on the RR HSE 4.2 SC, still no VVT. Advancing timing 30* under a forced load would cause a lean burn, big no no. ALL non SC Jags are VVT. If Dwiggy can drop a 302 into an LS, which I am doing too, but building the engine first :D, with the...