It depends on how much the car will be driven. If driven on weekends for shows,
general cruising, etc you will be fine on unleaded. If the car will be used like a
"second car" a lead substitute will be needed. The best solution would be to have
hardened valve seats installed in the heads.
 Your 67 is a good looking car, I had a 67 XL some years ago.

It's advised to add a lead additive.To run unleaded gas in older cars,
hardened valve seats need to be installed or damage may result.

Excellent choice of car. My first car was a '67 Galaxie 500 two door hardtop
(fastback). I currently drive a '68 Galaxie 500 two door hardtop. The
Galaxies are very reliable cars. One thing you want to check to be sure the
vehicle is safe is the frame. The '65-'68 full-size Fords are notorious for
frame rot under the doors and around the rear axle. My '67 was rotted in
those areas pretty badly, so I sold it being as how I had my '68 which was
in excellent condition.

As far as unleaded gas... Don't worry about it. My '67 had 202,000 miles on
it when I sold it and was within 3 psi on each cylinder of the 289. Those
little 289's are excellent engines. They are known as the "forever engine".
Running those lead substitutes and lead additives is a waste of money. They
do not add nearly the same amount of lead as was in gas back in the day, and
they do not contain the other chemicals which made the lead stay in a
gaseous form after combustion. The lead additives will leave deposits on
your valves and weld the lead deposits to your exhaust valve. When the time
comes for a rebuild and valve job if you are concerned about unleaded gas
just have hardened exhaust valve seats pressed into the head. Then it will
be a non-issue.

Just drive the car, enjoy it, and don't worry about gas. If you've got a 289
in that thing it will run on anything, unlike the alter 302's which require
at elast 89 octane. The 352 and 390 are also very reliable engines. For a
daily driver these big old Fords are excellent choices. Very reliable and
when they do need attention it's always something simple. The only downside
is gas mileage, which is typically in the 14-16 MPG range. The highest I've
ever seen from my Galaxies is ~17.5 MPG on the highway, which isn't too bad
considering the weight and aerodynamics. With current gas rpices the point
of diminishing returns is just over 20 MPG.

Anyhow, enjoy the car and don't worry about unleaded gas.

   Cory

It should run just fine on unleaded fuel.  I would suggest
the 89 octane.  In my younger days when these were new cars,
many people felt that Amoco "white gas" which was their
premium was the best fuel for almost any car.  It was
unleaded.  We used it in anything that needed "high test"
and a lot of things that did not.

The problem with unleaded gas where hardened exhaust valve
seats are not installed is valve recession.  This almost
never happens in engines which are not constantly subjected
to high RPM or heavy loads.  My suggestion to you is to use
the 89 octane rated fuel and enjoy the car until there is a
problem which is unlikely.   If it developes a problem
requiring valve work, that will be the time to install the
hardened valve seats.  Any machine shop that can do a decent
valve job should be able to install the valve seats.  The
benefit to this approach is all the free miles you will get
before it needs anything if ever.  Just save the money until
or unless the job is needed and get some sleep.  The cost
will be exactly the same if a problem developes as it is
right now when there is no problem.

Lugnut