what is the best way to increas the value 914, long term and short term 914 investment Options

[rfp]

My brother and I are thinking of putting our money together and doing some short term and long term investments in Porsches including 914's we don't have allot to begin with so we are looking at putting $1-2,000 into an early 914 and $1-2000 into restorations. We don' t have the skills or tools for doing the work our selves though my brother does paint and wire houses for a living and could probably learn how to paint cars. We are looking at have a local garage to do the work as they are familiar with restoring these types of cars. the owner is currently working on a 356 for himself.
We are looking to buy a slightly warn to well worn 914 in July or august and try to make a fast buck come the September Grand Prix festival putting the money back into buying and fixing another one.

My question is what is the best investment for fast resale value. What will make the car most appealing and make the car stand out: A new paint job (original Porsche colors or cool colors like metallic, new seat covers, carburetors instead of injectors, bigger engine, fixing one that dosen't run..........Just fixing rust spots..........

our goal is to get a chance to drive around some nice cars and at least break even but we would like to make something of the deal if possible.
I have read allot about these cars so I do have a general knowledge of problems to look for.