No spiral shocks. I can’t find any tag on radiator. I’m shocked at condition of radiator. The core doesn’t have any bent fins. Remember the old trick of putting screen in front of radiator to keep bugs out. It has screen in it. I’ll post pics of radiator I took some today.

Radiator pics.

Found another radiator picture. Notice the style of plugs used to cap trans cooler. It’s a 3 core radiator by the way.

This is the dealership my barn find 66 chevelle came from. Notice all the new cars are ‘66 models. Wonder if mine is there somewhere.

How mzz as y miles does it show? Any paperwork?

Holley sight plugs?

Does look like those. But those brass plugs might be stock from the factory.

75k miles. No paperwork still have a couple spots to look for buildsheet/broadcast sheet

So definitely not the original Rad. A 4 speed Rad would not have the trans cooler lines. But still a CORRECT Original Harrison Radiator with Finger Guard. Very nice ��

Brass plugs in the Harrison bottom tanks are Factory on some of the 65-66 GM models with manual transmissions.

I’m not sure this ‘66 SS still has it’s Factory installed radiator?

On a high horsepower such as this car, I would think it would have the wider 4 row radiator, as that is what Pontiac used on their Tri-Power 360 HP for the 65-66 GTO’s.

Many of the 1965 360 HP with manual transmission GTO’s from the factory had these slotted brass plugs in the bottom tank.

Photo below (difficult to see here) shows the plugs in the tank on a 15160 mile 1965 GTO Survivor.

The “top” tank on this ‘65 Survivor had the radiator code stenciled in white paint.

The fact that this ‘66 SS is a relatively early built 10D = 4th week of Oct ‘65 for the ‘66 model year, it could have a carry over radiator from the previous year?

There is a member on this forum which owners a 4000+ mile GTO Survivor with the 360 HP / manual trans that also has these brass plugs.

Chris.