Heater core changeout?

[Swampfoot]

99 Ram 1500 Regency conversion van, 360, dual a/c, dual heater cores.

How big a deal is it to replace the front heater core? A casual looking around makes me think it can be done from the engine side alone, with no dash pulling required.

Anyone done it?

Thanks!

[frankendart]

You're right, but you might have to remove a cover under the dash, and maybe the glove box to get at the mounting nuts, though. I did this repair on an 88, and it wasn't too bad. It took a little over 4 hours, but I wasn't in a hurry.
I removed the hood, though, I'm pretty tall, and I kept knocking my head on it...