For ease of fitment, the mini blizzard is the way to go.
You can run a 16psi pulley, however you'll need a custom tune done (with the mini)
Otherwise you can run a 13-14psi pulley in conjunction with our mail order tune
You can install the intermediate blizzard without any body work mods, depending on the car, type of engine mounts and pulley size.
Can further improve this by running K frame spacers
If you have any more questions please don't hesitate to ask.
Cheers,
Steve