I have a 1972 914-4 for sale. Low mileage modified engine is very stong. Springs and sway bars for autocrossing.
See
http://users.chartertn.net/scottgib/modified_1972_914.htm if you have a high speed connection or
http://users.chartertn.net/scottgib/modified_1972_914small.htm if you have a phone modem.
I have invested $7,200 and am asking $4,000.