Wonder what SAABS sound like when they blow up.
Hmmm Compression Ratio comes to mind for the NA motor...of around 10-1 roughly, probably better off using a turbo'd head to bring down the compression ratio...if possilble, even change out the crank, perhaps the pistons.
Lot of work so far.
Probably easier to just mod a turbo block, removing the turbo, to add a SC. the timing might be an issue also, not to mention an ECU to keep up with the SC.
Now a 3 liter V6 might be an interesting challenge...hmmm the possibilities seem endless. Or at least the cost to make them happen.