273 hp specs
Nice post, I have an old national service data boo that list all the cam specs, i think they were racer brown, and the solid lifter cam had I recall 70 degrees overlap, poor lowend, but above 3500 woke up good.
I built this motor back in the mid 70s, had custom pistons I went 11:0 and a little larger lift too. Well and tweaked the heads before I then went next step and noticed the block for larger valves etc.
Well I also recall the valve srings were monsters for the little 273, something like 185lbs seat pressure valve closed.
Amazine how years later they only gave a 340 a 275 hp rating. We know that was fake with beter exh, more cubes, and much better heads can etc..