Bob
That's all well & good, but I think you're splitting hairs. This pushrod is
specifically recommended by FMC/Ford motorsports for precisely this conversion
and has been used in thousands of 351head upgrades. Ford is in print w/this in
their MOtorsports parts catalog for years.
Frankly, given the cost & quality AND HP of the many aftermarket heads now on
the market, this upgrade is archaic anyhow.
Al J
Bob Palmer wrote:
> Al, Listers,
>
> Just some background on the question of pushrod length; Ford increased the
> 302 and 351 valve stem length 0.18" in '69 to provide more room for the rail
> rockers and also increased the pushrods by 0.1" (6.9" v. 6.8"). There was no
> change in this regard in the heads per se, so the use of longer push rods is
> not really related to 351 vs. earlier 260/289/302 heads, but is simply a
> question of the particular valves used. Ideally, one should undertake the
> procedure discussed previously on the List for determining the optimum
> pushrod length for maximum valve opening.
>
> Bob Palmer
> rpalmer@ucsd.edu
> robertpalmer@paulhastings.com
> rpalmerbob@adelphia.net
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