Heartthrob Exhaust

[FlameOut]

I was going to just take my truck and have a custom exhaust, but thought I'd check here first to see if anyone has any opinion on the Heartthrob kit (like this one at LMC Of course LMC is way more expensive than everyone else, so I won't be buying from them. From the Heartthrob page it lists 3 different setup for my 72 4x4. The 8141490 (no mufflers), the 4149SK (stock muffler) and the 4149GP (glass pak mufflers)

The problem is, every time I enter that item at any of the authorized dealers, they all say they don't fit the 72 K10. I did email Heartthrob, to ask why that was happening and got this reply: "you should be good to go, these kits are for the 4wd up through 72 (73 was a model change) and with center dump manifolds. The only “no fit” footnote I would have against yours is if yours has a Rockwell transfer case. Otherwise it should be the correct kit for your vehicle"

So does anyone have any experience with these on their 67-72 K10's?