Sorta, the original cars (short with a fat roller, Harken maybe) work ok, usually have to haul them as far aft on the track as possible. This creates a rather acute angle to the cabin top winch when close hauled. Some of the later Garhauer cars with large sheaves won't lay down enough and the sheet gets "sheeved".
Some people have mounted tracks outboard and winches on coamings (also used for spinnaker with snatchblocks aft).
Also, for long downwind runs I'd rig a light sheet outside everything and run it to a snatch block at the rear cleat like a spinnaker sheet.
In a race I never planned on finishing ahead of anything other than the other 270's.

BTW my boat came from the factory with the 155, it was an option at the time.