This old thread will give you some widths, post #2 - https://aus300zx.com/xenforo/index.php?threads/width-of-vg30dett.293751/ but if you keep scrolling through it you might end up wanting a VH45 instead of a skanky old VG30DETT
I have an audi v8 to put into this project, just looking for a back up plan if the engines now good. Need height width and depth of the engine to see if its smaller than the v8 engine.