I know I know but.. 73upfront susp on 67=72 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davidh · 04-09-2009, 02:00 AM

Im getting a wrecked front end from a 77 1/2ton truck with only 78K on it. I plan on changing out the entire crossmember for my 67. I remember reading All of the bolts match up with the frame but a few. Which ones are they? Pics if available please. Im finally ready to get this under my 67.

Oh and can I use the disc brake proportion valve from the 77?

Tx Firefighter · 04-09-2009, 06:18 AM

There are 14 bolts that secure the crossmember to the frame. Twelve of them line up exactly. The other two are slightly off. I find it easiest to install the crossmember and secure with the twelve bolts, then take a drill bit and drill to egg shape the remaining two bolt holes. They are that close.

A lot of guys use the whole brake system off the late model truck on the swap. Do be aware though, that the proportioning valve on the later models mount down low under the radiator area, rather than on the master cylinder on the firewall. As long as you swap the whole lines and all, it simply requires drilling a couple if holes to mount the prop valve on the earlier truck. Everything will lay in place on the earlier truck. Simply install the whole deal and drill the mounting holes as needed to secure the lines and valve.

**LockDoc** · 04-09-2009, 09:15 AM

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I don't know if this copy and paste will work or not but I'll try it. The following is from an earlier thread....

Shifty,

Maybe I'm not understanding your post but I have replied in most of the following threads (with pictures) about the differences in the frame holes. The last link mentions the difference in frame height.

http://67-72chevytrucks.com/vboard/s...ember+enlarged

http://67-72chevytrucks.com/vboard/s...ssmember+holes

http://67-72chevytrucks.com/vboard/s...ssmember+holes

http://67-72chevytrucks.com/vboard/s...ssmember+holes

http://67-72chevytrucks.com/vboard/s...ssmember+holes

http://67-72chevytrucks.com/vboard/s...ssmember+holes

LockDoc

Nope, didn't work....

**LockDoc** · 04-09-2009, 09:21 AM

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This should work:

http://67-72chevytrucks.com/vboard/s...ember+enlarged

http://67-72chevytrucks.com/vboard/s...ssmember+holes

http://67-72chevytrucks.com/vboard/s...ssmember+holes

http://67-72chevytrucks.com/vboard/s...ssmember+holes

http://67-72chevytrucks.com/vboard/s...ssmember+holes

http://67-72chevytrucks.com/vboard/s...ssmember+holes

LockDoc

04-09-2009, 02:00 AM	#1
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,220	I know I know but.. 73upfront susp on 67=72 Im getting a wrecked front end from a 77 1/2ton truck with only 78K on it. I plan on changing out the entire crossmember for my 67. I remember reading All of the bolts match up with the frame but a few. Which ones are they? Pics if available please. Im finally ready to get this under my 67. Oh and can I use the disc brake proportion valve from the 77? __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

04-09-2009, 06:18 AM	#2
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: I know I know but.. 73upfront susp on 67=72 There are 14 bolts that secure the crossmember to the frame. Twelve of them line up exactly. The other two are slightly off. I find it easiest to install the crossmember and secure with the twelve bolts, then take a drill bit and drill to egg shape the remaining two bolt holes. They are that close. A lot of guys use the whole brake system off the late model truck on the swap. Do be aware though, that the proportioning valve on the later models mount down low under the radiator area, rather than on the master cylinder on the firewall. As long as you swap the whole lines and all, it simply requires drilling a couple if holes to mount the prop valve on the earlier truck. Everything will lay in place on the earlier truck. Simply install the whole deal and drill the mounting holes as needed to secure the lines and valve. __________________ I'm on the Instagram- @Gearhead_Kevin

04-09-2009, 09:15 AM	#3
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,891	Re: I know I know but.. 73upfront susp on 67=72 - I don't know if this copy and paste will work or not but I'll try it. The following is from an earlier thread.... Shifty, Maybe I'm not understanding your post but I have replied in most of the following threads (with pictures) about the differences in the frame holes. The last link mentions the difference in frame height. http://67-72chevytrucks.com/vboard/s...ember+enlarged http://67-72chevytrucks.com/vboard/s...ssmember+holes http://67-72chevytrucks.com/vboard/s...ssmember+holes http://67-72chevytrucks.com/vboard/s...ssmember+holes http://67-72chevytrucks.com/vboard/s...ssmember+holes http://67-72chevytrucks.com/vboard/s...ssmember+holes LockDoc Nope, didn't work.... __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 04-09-2009 at 09:16 AM. Reason: didn't work

04-09-2009, 09:21 AM	#4
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,891	Re: I know I know but.. 73upfront susp on 67=72 - This should work: http://67-72chevytrucks.com/vboard/s...ember+enlarged http://67-72chevytrucks.com/vboard/s...ssmember+holes http://67-72chevytrucks.com/vboard/s...ssmember+holes http://67-72chevytrucks.com/vboard/s...ssmember+holes http://67-72chevytrucks.com/vboard/s...ssmember+holes http://67-72chevytrucks.com/vboard/s...ssmember+holes LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -



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