I am no expert engine builder but have seen some 308 heads built and they were what most people would consider rubbish,yet with standard valve sizes and a
and some minor mods. to unshroud the intake and a roller cam coupled with a std. intake manifold with a quady on top the thing made 320 bhp,it was in a brokodore
and the owner just kept the std. stuff to keep it looking std.
No doubt a bit more could have been squeezed out of it but for a car that your Granny could drive down the main street 320 is not a bad number and in a Torana should be
plenty fun and still be able to driven sedately should you choose to do so.
Big valves/ports is not always the answer despite the fact that the numbers tell you that this head makes this much HP etc.Put a shit cam in it and see if it makes
the claimed HP figure.If you have ever driven a 253 with a big valve/port head coupled with a baby cam you will know what I am talking about...worse than stock,and that's bad.
If budget is a factor a cleaned up set of std heads with std valves/ports and unshrouded intakes with a CR to suit a solid cam should be plenty.
A lot of the race concerns now work on air speed as an important factor rather than bigger is better, although you still need size for flow it comes down to our
enemy of having to compromise somewhere along the way.
