Bluetop
Engine = 510mm wide (from front of pulley to end of block) , 510mm deep (from back of inlet man to front of starter, sorry I have custom extractors so the very front measurement will not apply to you but add approx 120mm for factory manifold) and 650mm from sump to top of inlet mani.
Box = 370mm wide x 510mm deep x 350mm high
Hope this helps.