The heads flow a few cfm better than a stock passenger car head for a SBC.. They
will support around 440 hp max a 1 3/4 is more than enough and a length of 29 to
31 inches is appropriate. I would get whatever is available off the rack to fit
the chassis in those sizes. The next biggest bang for your buck on this engine
is a set of heads, with some valve gear that will allow 6800 rpm and then you
will have maxed out the bottom end of the engine that I remember to have stock
rods and crank.
Dave
Dick J wrote:
>
> What size primaries should I put on my headers? 350 CID, set up for 6200RPM,
>850 Edelbrock carb on Victor Jr. Heads ported to result in these intake flow
>numbers at 28: Lift
> .10 68.2cfm
> .20 133.0
> .30 187.8
> .40 213.2
> .50 210.0
> .60 214.1
> .70 216.8
>
> 1 7/8" primaries, or should I go for 2"? 3 1/2" collectors? Dick J in East
>Texas
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