getting the back of the cab straight

[i heart square bodys]

okay so ive been working on this for over a week and have gotten nowhere and its really starting to piss me off. what do i do to get this straight!!! i put bondo on it and board sanded it and i get no where. if i try to get rid of the high spots they either spring back or sink in and pop up elsewhere .. is there any trick to fixing this or am i going to have to live with it? i realize that it is like that from factory too.

[johnnyclack]

http://67-72chevytrucks.com/vboard/f...splay.php?f=16

Go to the drop down menu, Body & paint section those folks are to notch

[i heart square bodys]

alright, just thought id post here because it only pertains to 73-87 trucks as the others are different in this area

[pontgta]

Originally Posted by i heart square bodys

okay so ive been working on this for over a week and have gotten nowhere and its really starting to piss me off. what do i do to get this straight!!! i put bondo on it and board sanded it and i get no where. if i try to get rid of the high spots they either spring back or sink in and pop up elsewhere .. is there any trick to fixing this or am i going to have to live with it? i realize that it is like that from factory too.

What kinda BONDO??? Hopefully no real bondo..... i start with this




Then finish with





Then do a lot of k36 primer and block....and prime and block and prime.....


post pics please

[dieseldawg142]

had a dent like that behind the rear wheel, usually it's because the metal has stretched. my friend (auto body guy), gave me a metal shrinking disc to try, worked like a charm

[i heart square bodys]

Im using proform progrip body filler , ill post pics tomorrow morning
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[i heart square bodys]

annnnd it wont let me post pics !

[kjc292]

Haven't done any body work so I'm just throwing this out there to get done feedback, but what drilling a 5/16" hole in the middle of the bump, or getting a cutting wheel and cutting a slit in the bump, the do the same other way to make an ex. Grab a smal wire feed welder and start tacking and grinding away. Like I said I've never done body work, just metal work in a foundry to fix imperfections quickly.
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[kjc292]

I really do know hot to spell and make complete sentences. It's this damn touch screen, auicjer correct spelling and these thick fingers
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[i heart square bodys]

Originally Posted by kjc292

Haven't done any body work so I'm just throwing this out there to get done feedback, but what drilling a 5/16" hole in the middle of the bump, or getting a cutting wheel and cutting a slit in the bump, the do the same other way to make an ex. Grab a smal wire feed welder and start tacking and grinding away. Like I said I've never done body work, just metal work in a foundry to fix imperfections quickly.
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I thought about that myself acctually but wasnt 100% sure on doing it haha i work at a foundry too ! What do you cast ???
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[Jabes1]

I've had my truck a long while... the damn back of the cab drives me crazy too. I've never been able to get it perfectly straight.

[kjc292]

I work at columbia steel as a millwright. we specialize in chains for large earth excavators. im talking 4" thick, 12"wide, 24"long per link. then the company branched out into more parts for rock crushers, heavy metal scrape shredding....its crazy man. we have cones that funnel the rock into crushers, some are 10'tall 7'wide at the base. its actually kind of small though 10mt furnaces(lol metric ton) furnaces. there's OSM that has 100ton laddles.

[i heart square bodys]

Originally Posted by kjc292

I work at columbia steel as a millwright. we specialize in chains for large earth excavators. im talking 4" thick, 12"wide, 24"long per link. then the company branched out into more parts for rock crushers, heavy metal scrape shredding....its crazy man. we have cones that funnel the rock into crushers, some are 10'tall 7'wide at the base. its actually kind of small though 10mt furnaces(lol metric ton) furnaces. there's OSM that has 100ton laddles.

Ahh nice i used to rub one of those rock crushers acctually! Haha im making exhaust manifolds, couldnt tell you all the info there though because i simply dont know hahaha
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[kjc292]

Happen to make any for a '78 292?
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[i heart square bodys]

Originally Posted by kjc292

Happen to make any for a '78 292?
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Haha sadly no, last first gen parts ive seen were '98 truck manifolds for a 350 and that was last year :p its all stuff for gen4 and gen5 gm and a bunch of ford stuff along with a bit of chrystler and a few other odds and ends haha
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[i heart square bodys]

i think ive got it figured out ! in order to keep it from warping when i sand i put a few wrenches in behind the back of the cab between the ribbing and the second payne on the inside, just put them in far enough to keep the metal from moving when i use the sander and then secured them with tape and started sanding ! seems to be working so far