That converter was working pretty well in the car, Bill liked to run that car with full exhaust.I will be installing a new converter as the one 73smallblock had based on the results.
I'm absolutely sure that Fred would have ran 10.00-10:10s at sea level with the exhaust off and tuned collector extension as it was.
I think the cam was definitely undersized.
I'm not a cam sciencer but If it was mine I'd go 268 for intake duration.
I would also talk to prh about this.
He's a very smart/helpful guy.