Front Crossmember Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigblockc10 · 01-24-2006, 08:54 PM

to all you suspension Guru's:

I sandblasted the crossmembers for my truck 1 is a late sixties drum brake crossmember the other is a 71/72 disc brake crossmember I was planning on just swapping the disc brake stuff over to the drum brake crossmember because it is in a little better shape.

Now the Question the 90 degree bracket that bolts to the frame members are different thickness metal (drum .170)(disc.250) does this make any difference to the final set-up I would assume the thicker of the 2 is the strongest?

So should I just burn out the rivets and swap these brackets also?

Thanks for your replies!

Dennis
BigblockC10

**dennislbrooks** · 02-03-2006, 01:37 PM

you can just grind off the cast stop on the 71/72 spindle to get the turn radius back--and leave the late 60 lower A-arm as is

bigblockc10 · 02-03-2006, 06:51 PM

Quote:

Originally Posted by dennislbrooks

you can just grind off the cast stop on the 71/72 spindle to get the turn radius back--and leave the late 60 lower A-arm as is

I think you misunderstood the post I am refering to the bracket that bolts to the frame where the cross shafts are mounted to.
I'll try to upload a pic.

Tx Firefighter · 02-03-2006, 07:41 PM

If you're going to use disc brakes, use the 72 crossmember. The little tabs on the crossmember for the brake lines are on the front on a 71-72 crossmember and on therear on the earlier drum brake crossmembers. This complicates the brake hoses. If you use a 71 or 72 crossmember, you can simply run stock disc front hoses and not have to make adapters or run new lines.

01-24-2006, 08:54 PM	#1
bigblockc10 Registered User Join Date: Feb 2003 Location: Holland Pa. Posts: 76	Front Crossmember Help to all you suspension Guru's: I sandblasted the crossmembers for my truck 1 is a late sixties drum brake crossmember the other is a 71/72 disc brake crossmember I was planning on just swapping the disc brake stuff over to the drum brake crossmember because it is in a little better shape. Now the Question the 90 degree bracket that bolts to the frame members are different thickness metal (drum .170)(disc.250) does this make any difference to the final set-up I would assume the thicker of the 2 is the strongest? So should I just burn out the rivets and swap these brackets also? Thanks for your replies! Dennis BigblockC10 __________________ 1970 C10 Stepside (soon to be a 68 w/PS/PB/S&W back-half narrowed F**D 9inch w/Discs) 66 427/435 corvette motor (hopefully 871 Blower) 66 M21 4 speed (swapped in a built TH400) 31/16.5/15 Mickeys (soon to be 29.5X18.5X15 MT) 1972 C10 Stepside Pro-Street 1988 bed 3" Top Chop Custom Red Pearl paint w/overlapping Ghost Flames P/S P/W P/B P/DL P/door open Everything Shaved Frenched antenna 461CI BBC BDS Blower 1100 Dynoed HP TH400 Super Heavy Duty Full Back-Half Narrowed 12 Bolt 4:10

02-03-2006, 01:37 PM	#2
dennislbrooks Senior Member Join Date: Feb 2004 Location: Williamsburg, Ohio Posts: 1,766	Re: Front Crossmember Help you can just grind off the cast stop on the 71/72 spindle to get the turn radius back--and leave the late 60 lower A-arm as is

02-03-2006, 07:41 PM	#4
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Front Crossmember Help If you're going to use disc brakes, use the 72 crossmember. The little tabs on the crossmember for the brake lines are on the front on a 71-72 crossmember and on therear on the earlier drum brake crossmembers. This complicates the brake hoses. If you use a 71 or 72 crossmember, you can simply run stock disc front hoses and not have to make adapters or run new lines. __________________ I'm on the Instagram- @Gearhead_Kevin



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