How hard is replacing an XJ V12 series 2 engine by a series 3 HE?

[Aristides (Aristides Balanos)]

XJS build thread-- upgrades and Modern ECU

Hello All ! I am posting the beginning of a build… to upgrade the XJS with modern conveniences like Sequential Injection& spark, dual ETB’s, Coil on Plug, dual MAP’s, Manual 5 speed AR-5, race clutch, and more the hope is to have a running car!?.. someday… and after that, who knows!? [IMG_1967]