Welcome to DDK.
Regarding your questions about knowing how to buy an old 911:
1. Get some info via
http://www.amazon.com/Porsche-911-Red-B ... F8&s=books
and
http://www.amazon.com/Original-Porsche- ... F8&s=books
Have a read through this:
http://www.transend.co.uk/techtips.htm and the nonplussed specialist of the early 911 series:
http://www.early911.co.uk/html/buyer_s-guide.html
Thats one.
2. Get yourself a fair amount of dineros aside: there is no such thing as a cheap porsche. Even a good one will cost money. You suddenly get hooked on wanting to improve things or on Ebay you find things you never thought you were after!
3. Power in a porsche: all is relative. 85% of porsche drivers (old statistic I heard from a Belgian porsche racing driver) cant get the factory acceleration out of their car. First learn how to drive it properly, then scoop in a fast 3.0 or 3.2 engine which can relatively easy be done. a 1969 E has IIRC 140 bhp. Not a lot.
However: if you can drive like Charlotte with her 130bhp 911L at Le Mans,
http://www.youtube.com/watch?v=6_BgcMLs ... 7A&index=9
then come back and see whether you are man enough to handle a 911 with more than 200 bhp.
4. Ducktails: I have a ducktail on my car. A ducktail was introduced with the Carrera 2.7 Rs. This car had also slightly wider arches (carrera "hips"). A ducktail looks good with wider hips -(This is entirely personal obviously, and taste and colour can never be seriously discussed)- but it really spoils the line of an earlier car.
For a 1969, most people would feel very privileged indeed to own an original car because they are fairly rare. I feel that you should leave her original or go for a later car such as a 911 SC or 911 Carrera, "common" cars that you can modify away!
Best of luck,
Bert