68 k20 body mounts

[lowrollin70gmc]

I've done a preliminary search both on here and google, but I've come up inconclusive, and I don't have a lot of time on the internet over here (afghanistan)

Before I do my Cummins conversion when I get back to the states, I want to put new body bushings in my 68 k20, but I've been unable to find out if they're the same as the 1/2 tons and/or the same as the 2wd. If they are, it's easy to find bushings. Anyways, I was wondering if any of ya'll have replaced the bushings in a 68 k20 burb and if so, are they the same as a c10 or do I need to track down a supplier? I'ld prefer rubber due to the vibration of the motor and flexing off road.

Thanks,
Andrew