Reply to "roush motorsport single palne intake"

> I thought it was that the 331 was the torker

There were three A331's that I'm aware of. The large and small port Torker
versions and the Roush A331 like the one in my links above.

and the 341 was the spider for the B351 heads?

> Since George didn't post the "tiny" port 331 picture I'll see if I can post
> it here. The ports are way smaller the the B302 ports. Closer to a 289-302,
> 2v style port. It seems very obvious that it was intended to be match ported
> to whatever you had. However if you look at it the runners and the plenum
> were much smaller height wise then the 331.

That is an interesting one. That would be a good intake for C302B heads
if you want to keep a stock engine screen. I'd bet the Roush A331 is a
better intake but it is also considerably taller.

> That one is in the "parts catalog". I have not looked at it in awhile.

If you come across it, let me know. I've got a database of part numbers
and info from all the Ford Motosport catalogs since 1984. I've not seen
an A341 in them but that doesn't mean one didn't exist. Ford did a lot of
small production run stuff.

> I'm assuming there is some critical dimension like the distance between
> the lower intake edge of the heads is different, but what exactly are those
> dimensions on a 9.5" and 9.2" block?

I don't have those numbers handy but if you measure your engine or a 351C
intake for it's width (at a specific point), the 9.2" intake should match
it and the 9.5" should match a 351W intake.

> This is the case of the manifolds that use one basic casting for both. The
> intake for the 9.2 is going to have more material milled off the mounting
> flange.

Correct. That is true for the A351/B351 common casting intakes but not for the
Roush A331 (with cast-in numerals). If you look at my Roush A331 and George's,
you'll see mine has the thicker lip, even though it is for a 9.2" deck.

> Here is the picture of the special small port a331 torker. You may at first
> assume that it is the size of a C302 port but it is actually much smaller.

That's a rare one. I'm told Ford had a number of variations on the high port
intakes (and heads). I've been told (but never seen) there is a high port of
the Scorpion.

Dan Jones