Hey Rod, I just ran the tape measure across the 1G-GZE sitting in the shed.
Length: from rear of block to front of timing case 620mm. (You will have to allow for harmonic balancer etc.)
Height: Bottom of sump to top of cam cover 600mm (no manifolds fitted)
Width: including exhaust manifold and intake manifold 1GGZE 590mm.
I would expect a few variances in overall height and overall width between the 1GE/1G-GTE, and 1G-GZE.particularly with engines complete with manifolds.