crossmember swap and new wheels

[2mas]

Hi guys,
I'm doing a crossmember swap on my 3/4 66 to a early eighties to get the disc and 5 lug and also make complete air bag drop easier. Will the backspacing/"track width" (is it called that?) change if installing the newer parts?

I'm going for 20 inch wheels with maximum drop, so I really need the backspacing right.

/Thomas
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[Captainfab]

Yes the track width will increase when upgrading to discs. I just don't remember exactly how much it is. I want to say it is 2 to 2.5". Someone else may know for sure

[blazins10]

my wheels are 20 by 8.5 with + 5 offset , it tucks perfectly
mines on a 82 front end with a 72 rear
and lays frame
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[2mas]

Any one knows? how will my back spacing be effected by changing to eighties cross member? br /Thomas
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[2mas]

Hi,
Looks like this was a difficult one

if you would go with 20 inch on a bagged truck without the changed crossmember, 8 wide in front and 9 wide in back. What back space would be used?

Br/Thomas
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