305s had 1.72" intakes with 1.50" exhaust valves. Depending on the 350, it could be the same, or have either 1.94" intake and 1.50" exhaust, or 2.02" intake with 1.60" exhaust.
The only difference between the two Chevy heads is the size of valve they were designed to fit. Either size will work correctly on all valves, though.
body style, and more B>S electronics and engine size................1979 was a much better car.
Common differences are size and color.
Need more info - what is it for? What is the size of the pipe and the pressure differences you are trying to get?
size
size and value
Size and material its made of
The differences is the size.
The only obvious differences between male and female crocodilians are their size differences :)
Almost all had 1.94 intakes and 1.50 exhausts.
engine size
No. The bore size is different between a 305 and 350. The 350 bore size is larger.