No, none of the 1980 - 1986 tanks are baffled. In 1985/86 when EFI was introduced they placed a low pressure lift pump in the tank that kept a plastic reservoir filled on the frame which is where the high pressure EFI fuel pump mounted on the frame pulled fuel from. It was a band aid done by Ford to work around fuel slosh.
If you source a '85-'86 tank the hole is big enough to reach your hand down into the tank and weld some baffling plates in to help hold the fuel in the sump area. This is what I plan on doing.
When I look at the 16 gallon side mount tanks on Rock Auto there appears to be no difference between a 1986 vs. a 1996.
I wonder if the '92-'96 tanks are baffled? Is the diameter of the sender hole the same?