My FE rides INFINITELY better than my conventional Thomas did. Nice turning radius too.
The noise isn't as bad as some people make it out to be but is very real, too.
I'll take a lil noise to have a back door.
Mostly depends on the engine gearing, if it's constantly being driven at high RPMs, it's gonna be loud in there, especially at highway speeds. Another thing to consider is engine heat as there's usually not much insulation in the doghouse and what's there is usually pretty detoriated after 10-15 years.
I've got a 1988 TC/2000. It's an FE transit style. I don't think it's too loud, and the heat isn't particularly noticable (but I don't have A/C). You could probably cool/quiet it down by replacing the insulation under the dog house. Maybe throw some heavy wool blankets over it too?