Pontiac: #16 Heads...should I get them?

I would question if an iron headed 9.8:1 cr with a Comp cams 270 cam
would run will on pump gas? Do the #16 heads have hardened exhaust
seats?

unix-freak wrote: 

I have #16s on my '67 GTO. They came off a '68 428. I am trying to
remember everything I did, but I just can't. Anyway, I do have stock
pistons ( I think I do, anyway) and the Ram Air (S grind?) Comp Cams cam
installed. IIRC, the 428 had 10.75/1 stock compression. Also, IIRC the 428
and the 400 share the same piston size - the 400 has a shorter stroke which
should lower the compression number, right? Anyway, I run super (94)
exclusively - I've never tried regular (87). It runs very well with this
setup, but keep in mind that I had #16s on before the change as well. I
have no point of reference that would say they are better than the 6x heads,
but it will definately run with them.

For the HP/torque answer, check out the engines that had the #16s on them.
I believe a '67 catalina would have run them.

Finally, would I spend 180 more to have a set of heads that weren't ever
cracked? Yes, I would - but that's me...

"unix-freak" <com> wrote in message
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I really don't know if they have hardened seats.
Anyways, my engine builder convinced me to stay with my 6x-4s.


"Stan Weiss" <com> wrote in message
news:com... 

It kind of pains me to say it, but as all the junkyards seem to melt
everything down over 10 years old, and since Pontiac 350's are considered
pretty worthless, I would guess tens of thousands of 6x-4's have been
recycled for 3 cents a pound. They made a large number of 77 350's, but I
think the majority have already been crushed. If anyone is in a junkyard and
spots a 77 Grand Prix with a 350, try to carry those heads out! It's sad to
think you'd have to repair something once so taken for granted.

"unix-freak" <com> wrote in message
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