924/944: Installing a fuel cell
 

Other than building a frame work and installing a 8 gallon cell in the right rear area......has anyone come up with any other method??

Where the rear seats go (you need to build a bulkhead with either method) but it should help reduce the pendulum effect as the weight changes due to fuel usage.

Or replace the stock tank location with a custom made cell.

Or mount it in the trunk area (CoG is a bit high though)