I picked up this Ford oil cooler (stamped "F2UH-7A095-BE") - see attached pix.
I did a little checking and maybe it was from a 1993 Ford E350 van?

Well, it has push-on hose fittings and I would like to replace them with some male or female -AN fittings to fit some hoses that I already have made up.

The hose fittings have a hex at the base, and after soaking them in some penetrant, I tried to unscrew them, but there's more resistance than I want to exert -- thinking maybe these are NOT removeable fittings.

ANYONE ever remove these fittings before?
Are they removeable?
If so, has anyone ever removed these fittings before?
Clockwise or counterclockwise?
Can I try heat, or might this produce a leak?

Thanks for any advice.