I am very happy to hear that the Isuzu Forward/F-Series will once again be sold in the North American market.

http://www.isuzucv.com/en/fseries/index

However, this time around; the Forward/F-Series will be sold with the same 4HK1 diesel engine that had always powered the Elf/N-Series since Isuzu had put the 4HK1 Diesel Engine into production, and not the 6HK1 Diesel Engine that the Forward/F-Series had been sold in the North American market in the past.

The 4HK1 is the 6HK1 with 2 cylinders removed to create a 4-cylinder engine.

A Front Engine and a Rear Engine chassis-both of which would be based on the Isuzu Forward/F-Series would be the only chassis that would be available on both the Front Engine and a Rear Engine versions of the Blue Bird All American if General Motors and Isuzu had each purchased a 50% stake in Blue Bird.

See this earlier post for more information about Blue Bird All American should General Motors and Isuzu had each purchased a 50% stake in Blue Bird:

If General Motors And Isuzu Had Each Owned Fifty Percent Of The School Bus Manufacturer