im new

[Blackwulf]

Allison was a division of General Motors that made their higher end/turbo motors. 
I don't think they were ever licensed out to anyone since GM had enough manufacturing capacity at the start of the war, and was able to expand fast enough to keep up. 
GM also owned Detroit Diesel.  GM eventually merged the companies into Detroit Allison, then sold if off to Daimler in 1970 if I recall right.
I see a lot of inaccuracies on the History channel sometimes, it's scary.  But perhaps the confusion lies in the Mustang getting a Merlin engine to upgrade it, and someone at HC assumed the P38 upgrade was a Merlin as well?
I have to wonder though, how the P38 would have performed with twin boosted Merlins

[stealth]

What is this topic about again?

[Nemisis]

Give? You can not be serious.

Not entirerly. But I DO think that whatever the best design is, should be produced by as many companies as can make it. Why would you want to produce F4F's rather than FM2's?

[321BAR]

I think I recall the history channell spitting out something like that once, and they kept flashing to a picture of a four cannon pony.

i think you nailed it

[Rino]

Not entirerly. But I DO think that whatever the best design is, should be produced by as many companies as can make it. Why would you want to produce F4F's rather than FM2's?

     Depends on whether I own Grumman or General Motors stock I guess.  You do realize these companies
do get paid for their efforts even during wartime, right?