Ok, you 2 are pretty funny for 1st thing in the morning!
@Lostronin- Some very good points being made by everybody. As Uncle Stan said- if anything else will scratch the itch (and we do mean ANYTHING!) jump at it! Your visions of roaring around like James Dean with the wind in your hair will quickly be destroyed by this cantankerous pile of parts that hasn't been cutting edge since automotive technology was barely out of it's infancy. I hope you're already somewhat familiar with cars in general, and as has already been said, be prepared to tinker, or the car will spend most of it's time languishing in the garage, waiting for someone to give it the tlc that it so needs. If you haven't taken the time to learn to take care of it's needs (and these cars needs are many!) or found a mechanic to do so (not as easy to do as you'd think- competent VW mechanics that can do the high performance end of it are not on every 2nd street corner any more) you'll end up selling the project, possibly for a chunk less than you paid for it, the whole experience leaving a bad taste in your mouth. If any other affordable convertible out there will do it, go for it.
Don't expect to be loved, or even respected by the Porsche community- the odd guy will like what you've done, but even a build that mimics the factory cars pretty closely (swingaxle trans, drum brakes, 5x205mm wheels, stock size tires, correct dash layout with believable replica gauges and knobs, stock color combo, type 1 engine dressed to look like 356 or even a 356 or 912 engine installed) will not get more than a passing glance of most P owners. Once they realize it's a plastic car with no P vin # most will not be interested. If you can accept that you're driving a Bastard Child of the automotive world and it gives you that Sh!t Eating Grin driving (or even just looking at it in the garage) you'll be happy.
That said, if you're still here and game, a Speedster delivers a driving experience like no other.
WELCOME TO THE MADNESS!
PS- my apologies for sounding so negative, but there are some things you just gotta know...