'65 Barracuda FS 273 4bbl 10.5 CR on pump gas in CA

Just had my 383 rebuilt as a resto. Builder is very qualified so left details to him as long as engine appears original on the outside. He reduced compression down to 9.0 and went with a hydraulic roller cam. This was to better work with the poor gas and oils. Then we dyno'ed it. I picked up 100 horses over stock! She sounded sweet on the dyno, and it is running points ignition and original carb. Timing is now different- vacuum advance is present but blocked off, so initial timing is now 15*. Who says that you can't teach an old dog new tricks.