So I have a few snags to overcome such as rebuilding the dog house area, a new doghouse/engine access cover and finding a frame to motor mount bracket all of which have been discontinued.

I am going to have to cut the firewall and floor to put in the floor section of a 6.5 or 8.1 van.

I really don't understand why GM didn't just use the larger doghouse and opening for ALL vans. Would have made things like plug changes, exhaust manifold work and intake work MUCH easier. Especially with the big blocks 4" rearward mounting location.