Chosen Solution

The top case for my 2007 MBP 15" (A1226) needs to be replaced as it’s quite worn down and I have recently come into possession of a top case for a 2008 15" MBP (A1260), and I was wondering if I would be able to install the A1260 top case on my A1226.

Yes, it will work: MacBook Pro 15" Core 2 Duo Models A1226 and A1260 Upper Case Replacement