Installing small block from the bottom

Have any of you installed a small block in a Duster from the bottom? We have the engine and transmission, headers, and most of the suspension pieces installed on the K-member. We ran it up that way with break-in oil. The plan is to install it from the bottom, but I got to thinking..... will it really fit? There is absolutely nothing in the engine bay at present as the car is a completely stripped shell. So if any of you have done this please share some personal insight.