small valves small ports low compression low perf
151 to 157 intake port volume. Very limited high perf potential.
If you are looking for a cheap SBC cylinder head for a budget buildup to make more
power, find some 305HO heads, home port them and install larger 1.94x1.60" valves. Just the ticket for a low budget 350 hi-perf build with flat top pistons.
Now you'll have the compression and port flow to support a high perf cam and make some power.
eg: 14014416...80-86...305..........1.84"/1.5" valves, 58cc chambers