Sometimes the fridge doors can be removed and it gives you a few more inches. And the plastic on the top that hides the screws you hold it on by.
And some have had to remove a window to get it in or out. That is if your has a window big enough which may not be on a 1550
When you said frame removed, did you mean the entry door frame or the fridge door frame? Both can be removed to give more clearance. Somehow Sunline got it in there and it was after the roof was on.
Hope this helps and let us know how you made out.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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