William Helfrick Florida 1979 targa 3.6 looking for info

[nico55]

Hi Guys, I bought a 1979 metallic brown targa with a 964 engine. Former owner in Florida was William Helfrick. Unfortunately he passed and there is no history/invoices.
Anybody knows Mr Helfrick and his car and who did the conversion and maintenance? Would be great to have some history. I'll add some pictures later today. Thanks, Nico