Brad, if you look at the opening closing points of the 255 vs the 254 cam, and were to install them both at say 108, the only event that changes is the exhaust opening discounting the ondegree difference in intake timing. Maybe your motor had great exhaust ports , which makes me wonder how your motor would have responded to something like a 252/248/107 or 106 lsa cam
If I wanted to build something similar today, I wouldn't use any of the cams that I tested or actually ran in the car. But that's because I'd look for lobes that would be easier on the valve train due to street use. However, the duration & LSA would likely still be very close to the 254/254 on 108.
