Help! My pig got frozen, cooking Saturday

My pig farmer called me today on the road from the abattoir to say we have a "little problem." Turns out the other day when they butchered it, somebody failed to listen or remember that I'm cooking it Saturday and stuck it in the freezer. I crank up the smoker around 4am Saturday.

Right now, on the road, it's in a cooler with the top cracked, no ice.

They also forgot to cut the ribs and backbone so I can butterfly it. Weighing in around 80lbs, I don't think it'll fit under the 7-3/4 height of my upper shelf unless it's butterflied. I want to throw some chicken on up there with some hours to go, so it's important.

So the plan is for him to show up in a bit at my house with it, we'll cut the ribs & backbone with my sawzaw, and sometime tomorrow as it thaws I'll put some ice in there with it.

Is there a safety issue with thawing the outside too fast? Is there much chance the thick parts will still be frozen after thawing for 38-40 hours?

Love to get some perspective and advice. How much of a disaster is this, and is my plan solid or still risky??????

Thanks! Just like a turkey. When should I do such and for how long? Today, and then keep it on ice until I cook? Or at the end if it needs it, say Friday evening (I plan on sleeping from 9pm till about 2am, before the cook.

Also mourning the fact that it'll no longer be "fresh" and never frozen. Grrr. Shouldn't make too much difference, though.

my cooler is big enough and has a drain. 68 degrees outside too, at 3:20pm...

Cool! I live way up in high near the Smokies.

I have -- drrrrrumrollll. A thermapen. Can't think of a better way to test it than in ice water.

But -- big BUT, will the thing thaw out in that amount of time? Is my cook going to be OK???

Thanks -- on about 4 bags of ice and submerged in water (it's doubled in two plastic bags), the temp immediately plunged to 32.8 degrees (Thermapen). I added more water and brought it up to 36 or so. Didn't consider that the pig itself was a big block of ice, effectively. Bt the temp could be dropping again... I'll change the water out again before I go to bed, make sure it's under 40, add ice if necessary, and repeat the process in the morning.