Crew C30 vs C20 differences

[kevinr1970]

Originally Posted by ElGracho

True on the same frame.

They did make a 3/4 ton crew cab. Not sure where you are getting this. The 2 wheel drive dually does not use a spacer on the front brake. The brake rotors are one big casting.

I can confirm that the rotor is one casting, with the "extension" cast into it. I know the calipers and other brake/front parts were the same so I assumed that the rotor was the only difference. Thanks for confirming that!

Originally Posted by andrewmp6

The crew cab was 1 ton only they never made it in a 3/4 ton.As far as a dually to single wheel swap the front you change the rotor and take off the dually spacer thing.The rear you need a whole new rear end and you need a new bed also.The question is do you want to keep it 8lug or are you swapping down to 6 or 5 ?

I can confirm that they made a 2-wheel drive 3/4 crew until at least '87, as the '87 sbcc in my sig below was a 2500. But I think the 3/4 tons stopped in '88 or '89 and it was 1-ton only until they stopped them in '91?
Also, I thought they stopped the 3/4 ton 4x4 crews in like '80?
There was a late 70's GMC 3/4 ton crew for sale locally about 6 months or so ago and I would have bought that one in a heart beat, but they guy finally answered his phone when he was on a test drive with someone else!?!

I was told that the difference on the FF between the SRW and the DRW was "from the backing plates out". But I am not sure what exactly that all entails? I am thinking it might be cheaper to find a SRW rear than replacing all the parts to make mine SRW?

As for lug count, it will stay 8-lug. I did 1/2 ton/5-lug on my last one and it rode great as a driver, but this time I still want to be able to tow with it.