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My mechanic just gave some bad news my frost plugs are gone and need replacing is that a huge job

When you say they're "gone". Do you mean that they're leaking? Has the car been sitting a long time or have you been driving it?

It should be pretty straight forward. If you're so inclined, you can probably do it yourself. I think all of them can be reached with the engine in place.

On the passenger side you'll need to take off the starter and oil filter to gain more working room to reach the rear one. The driver side is more cramped and may require removal of the exhaust manifold.

There are 6 big ones and a couple small (1/2" or so) threaded ones. There's also one extra large one. They're the cup style, not the disc style.

The biggest thing to worry about is internal corrosion of the water galleries which may be present.

Thank you Otto
I’ll check
I might since the car is at the mechanic and I have spent all this money on exterior and complete interior chrome suspension steering etc ... I was thinking about pull the engine and transmission have them resealed and re painted
It’s a shame because the car runs great the transmission shift smooth

I hope they go back together
The same way

Obviously it looks like the car hasn't been sitting around deteriorating so internal corrosion is probably not going to be too serious. It should still be checked and flushed if the core plugs are removed, though.

I'd replace the plugs that are leaking and leave the rest alone. If you absolutely want to do a total restoration of the engine, then yes, pull it and do everything. No sense opening a can of worms that doesn't need to be opened, though if you'd rather drive it and it's working fine.

If it aint broke don't fix it is definitely the way to go.