http://t0.gstatic.com/images?q=tbn:A...pY89QRI_1fEn1g
The above engine is dressed up with deep sump and tall rocker covers, my unit is only 16/17" tall with a 6" sump. port face side to side is 17" so even at the front where the chassis is narrow i still have 5" of clearance each side of engine. It actually looks a bit lost in there.