Welcome Glenn, That was a lot of repairing.
It sounds like your Dad built the Revell "Simplified Build" Constitution kit. It was 22" OA with a 17" hull. It scales at about 1/159.
The other possibility is the IMAI or Monogram kit listed as 1/120 and is 29"OA with a 19 inch hull.
In either case they are both great kits.
Can you post some photos of the model? I would really like to see pictures of your Constitution.
Since you recently joined and have probably not posted any pictures yet, there is a bit of a learning curve to post pictures. The Technical Assistance Forum and also the Testing Forum have some photo posting information. However, the best resource is Just Ask.
Nino