I had my 75 911 in this shop last year. I had it in two other shops prior and they could not get it to run properly and had solutions that they THOUGHT was the problem with estimates at thousands of dollars. Precion Motors had it back to me in 4 days and the bill was under well under one thousand dollars. IT RUNS PERFECT.
The exact same thing happened with my MGB and Land Rover. The MGB was in and out of shops for seven years. Thank God I finally took it to Precision.
These guys honestly know these cars inside out.