Pre SN 2001 length on trailer

Does anyone know what a pre SN 2001 measures from the tip of the trailer tongue to the back of the boat (minus swim platform)
My garage measures 20' 6' from wall to garge door when closed. Can the bow stop be moved forward enough to flush the boat with the back of trailer to make that work? I know it will be a little more tongue heavy but my truck can handle that and it's less than a 5 mile drive to the ramp for me. HOA requires boats to be inside a garage (I prefer to store a boat inside as well). Has anyone had any luck modifying the older #3 trailer tongues to swing away? I will have to do removable platform brackets either way.

I've been hunting for a ski tique or mustang and was just informed my parents neighbor will be trading his 78 SN this winter for a new Bryant when it is finished. Boat is near perfect for it's age and he would be willing to sell for the trade offer of $3900. Boat is 5 hours away, on a lift and trailer is 2 hrs the other direction so it's going to be a while before the owner/my father/or myself can check.

Fulton swing away tonge kit

Not sure how you’d install 2 kits made for tubular tongues onto c-channel rails half the width. You don’t need both rails to swing- one should be pinned.

Custom would be a better solution for less $.