H2s on a '78 K25 4X4 [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: H2s on a '78 K25 4X4


CottonWoodBlues
01-18-2006, 05:51 AM
My son wants to put a set of these on his pickup. It's a HD 3/4 ton, 8 on 6.5" bolt circle. Anyone done this yet? Got pics? Any problem areas with fit? If I don't hear anything here, we'll try it out this spring and I'll post it here.


CWB

TheBac
01-18-2006, 06:29 AM
Only thing I can think of is the hub diameter. Don't the older trucks have the larger size hubs?

Bolt circle is the same.

NODMAX
01-18-2006, 06:49 AM
Seen them on the 3/4 ton 88-00 body style

CottonWoodBlues
01-18-2006, 07:00 AM
Only thing I can think of is the hub diameter. Don't the older trucks have the larger size hubs?

Bolt circle is the same.

Thanks for the tip. I'll measure it.


CWB

Dmax Tim
01-18-2006, 07:08 AM
IIRC the 88-00 have the same hub size as the new trucks but pre 88 has the larger hub like the dodge still uses.

Get someone w/ a CNC mill and have the open up the center hole.

Howling
01-18-2006, 04:39 PM
I've even heard of people using a hole saw to open the hole up.

DURYMCGEE
01-18-2006, 04:48 PM
I put some on My jeepster, his truck should have a d44 or 10 bolt up front, I know the hubs are too big for the wheel, you have to machine the centers of the wheel out, the only good way to do so is with a rotary table and overhead mill or a big lathe. It cost me about 120.00 to have the set done at a local machine shop here, but the wheels were free so I didn't care

CottonWoodBlues
01-18-2006, 06:56 PM
Okay, that's what we needed to know. He wants to use them so I'll be looking into the process of opening up the center. And if nothing else, I can always sell them to a wider user base... Thanks for the info.


CWB