318 head flow

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PRH said:
An X head / with a valve job and some 2.02/1.60 nail head valves can flow in the [email protected] range with no porting on the intake side.
Unfortunately, the ex ports aren’t any better than other lowly 360 heads....... sometimes not even reaching 140cfm in stock form.
Click to expand...

Hence those old school cams with a big split duration..... as recommended by the factory for racing the stock head....
 
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