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#1 |
Registered User
Join Date: Feb 2007
Location: Cali Central Coast
Posts: 5,191
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best way to indent frame for PS -
I have to do it to my '67, but I was wondering if anyone had an easy way to do it... it looks as if you would have to take the fender off and heat up the frame, and start whacking away, but someone must have come up with something a little easier than that. I don't want to shim it because they steer a little different when you do that. What is the procedure that some of you guys have done, and how has it worked for you??
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'67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD ![]() Click here to support the board Philippians 4: 6-7 Last edited by dan42; 01-31-2008 at 07:37 AM. Reason: spelling |
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#2 |
Tasty Cakes!
Join Date: Apr 2003
Location: Gilbert, AZ
Posts: 2,112
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Re: best way to indent frame for PS -
I'm interested in this as well. Gotta fix what the P.O. didn't do the first time around. I have been told the only way to do it is like u said. Heat it up and hit it.
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I'm a little ![]() ![]() Ground beef: A cow with no legs. ---------------- '66 Chevy SWB "Penny" '67 Chevy Big Window SWB- aka "Pearl" '72 Burb- "Betty" "It's not a hearse dammit" '99 Chevy Ext. cab Silverado |
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#3 |
Registered User
Join Date: Oct 2006
Location: Arizona
Posts: 835
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Re: best way to indent frame for PS -
Heat and BFH is probably the only way.
I'm a bit confused on shifting the box over a 1/4 of an inch how that would make it a noticeable steering difference. I understand it could, but somehow doubt this much would be noticeable. In theory I know there is built in play in the wheel, but couldn't that be "corrected" at the tie rod level if this was the case? Couldn't heating the frame and beating on it do the same thing? It could twist the box instead of staying on plain and create the same problem. . Hum.. this got me thinking.
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67 Short Step, 355, 700R 4.11 posi rear, 4/6 drop Discs on all 4 corners. Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=219094 Last edited by whatnow123; 01-31-2008 at 08:02 AM. |
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#4 |
Registered User
Join Date: Feb 2007
Location: Cali Central Coast
Posts: 5,191
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Re: best way to indent frame for PS -
Honestly, all I'm going on is guys that have shimmed their boxes on this site have commented that the steering is a little "twitchy" and does not return to center very well. I've never driven one with the shims, but my '70 is from the factory PS and doesn't have the twitchy feel - it's very smooth. I guess I just don't want to get it together and have it not steer right. As for tweeking the steering box, I don't think that would disturb the frame that much, but I also though about notching the frame out a little, and that would not disturb the "straightness" of the frame, I'm guessing.
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'67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD ![]() Click here to support the board Philippians 4: 6-7 |
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#5 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: best way to indent frame for PS -
Just an idea,... Could you notch the frame and weld in a "half round" piece of tubing or pipe, vertically into the frame, directly behind the steering box hump?. I also have a '67 frame,... and have been worried about this. I even thought about cutting the correct piece out of a later model (68-72) frame and splicing it back in. Now,... with Porterbuilts "Dropmember" available,... I think I'll switch to a rack. I guess I have to buy a Dropmember now.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#6 |
Still Just Havin Some Fun!
![]() Join Date: Jun 2007
Location: Piedmont, Oklahoma
Posts: 1,145
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Re: best way to indent frame for PS -
does anyone have pics of the 67 frame without and one with to see the difference?
I am in the same situation.
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a green one with some stuff done to it.... |
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#7 | |
Registered User
Join Date: Oct 2006
Location: Arizona
Posts: 835
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Re: best way to indent frame for PS -
Quote:
Early 67 is a completely flat frame late 67 and early 68 they had the raised attachment points Late 68 and on they had the raised attachment points and the "divot" for the box. I could be wrong and probably am on the above. I would think that if you got the wheel lined up in the "sweet spot" of the steering box and adjusted the tie rods accordingly, I don't think there would be a problem at all other than a very small difference in full turning radius between the two sides with the wheel cranked. I spaced mine out, as I have the frame with the raised mounting points with no divot, but I haven't driven it yet and have nothing to go on.
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67 Short Step, 355, 700R 4.11 posi rear, 4/6 drop Discs on all 4 corners. Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=219094 Last edited by whatnow123; 01-31-2008 at 09:16 AM. |
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#8 |
Registered User
Join Date: Jan 2008
Location: Satsop, WA
Posts: 606
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Re: best way to indent frame for PS -
I have done a number of these and have never bothered with modifying the frame. I have allways just machined some spacers and welded them to the frame then mounted the box. Steering box that is....
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1963' Chev Custom Cab 502, 67' 435hp 3X2 intake, 9" 4:30 Posi 1961 Impala SS 348/350 4-speed 3:70 Posi 1961 Bel-Air Bubble Top 283 Turboglide soon to have a 348 3X2 4-speed 1950 17' Fairliner twin cockpit barrel stern 312 Y block 1X1 intake Borg Warner 1:1 gear 1957 Fleetform 14' twin cockpit barrel stern 1969 BP-125 Merc 1949 Transitier 3-wheel forklift Crosley 4-Banger 98' FXD 2002 2500HD |
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#9 |
Registered User
Join Date: Feb 2007
Location: Cali Central Coast
Posts: 5,191
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Re: best way to indent frame for PS -
So, you don't notice a difference for the steering since it's no longer centered? There is no twitchy-ess, and it returns to center o.k.?
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'67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD ![]() Click here to support the board Philippians 4: 6-7 |
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#10 |
Registered User
Join Date: Jan 2008
Location: Satsop, WA
Posts: 606
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Re: best way to indent frame for PS -
have you ever looked at a street rod steering shaft???? No problems...
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1963' Chev Custom Cab 502, 67' 435hp 3X2 intake, 9" 4:30 Posi 1961 Impala SS 348/350 4-speed 3:70 Posi 1961 Bel-Air Bubble Top 283 Turboglide soon to have a 348 3X2 4-speed 1950 17' Fairliner twin cockpit barrel stern 312 Y block 1X1 intake Borg Warner 1:1 gear 1957 Fleetform 14' twin cockpit barrel stern 1969 BP-125 Merc 1949 Transitier 3-wheel forklift Crosley 4-Banger 98' FXD 2002 2500HD |
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#12 |
Sisyphus was my mentor!
![]() Join Date: Sep 2002
Location: Carleton Place, Ontario CANADA
Posts: 984
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Re: best way to indent frame for PS -
My fender was on while I heated & bumped my frame in. It was pretty easy actually...
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passthebuck ![]() #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car |
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#13 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: best way to indent frame for PS -
I have one each. 68 GMC and 69 Chevy. The chevy has the indent and the GMC does not and I converted both to p.s.
On the GMC, I used washers to shim it and have not had any problem with the steering. I can't tell a bit of difference between them. The steering wheel alignment is a little off on the GMC but that can be corrected by adjusting tie rod ends. I will say that someone mentioned the stress on the upper seal caused by alignment may cause the p.s. gearbox to leak. Mine leaks slightly but not sure if it was doing that before or since I installed it. |
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#14 | |
Registered User
Join Date: Feb 2007
Location: Cali Central Coast
Posts: 5,191
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Re: best way to indent frame for PS -
Quote:
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'67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD ![]() Click here to support the board Philippians 4: 6-7 |
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