What are the diffrences between these two heads?
04-25-2003, 08:13 PM
#1
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Car: '84 Z28
Engine: Goodwrench 350
Transmission: 700R4
Axle/Gears: good guess
What are the diffrences between these two heads?
The heads I am talking about are a set of 450's and 416's. They are both 305 heads. I know the 450's were a earlier head but is there any physical diff. (flow capability) between the two?
04-26-2003, 10:54 AM
#2
The '450 castings are "Smog-Dog" heads, with likely smaller valves, certainly larger chambers (lower compression), and probably runner designs that go along with those drawbacks. If you can get the '416 castings instead, it's a definite improvement as a starting point.
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