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#1 |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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I need some advice.
I bought a 77 1/2 ton tonight. Dont know if it is going to run or not. Didnt care at 200.00. My 69 1/2 ton has drums all the way around. I was told that I can swap out parts from the 77 to make it 5 lug and disc. Does anyone know if this is true? I have never done this swap before. I have from a 72 to a 70.
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#2 |
Senior Member
Join Date: Nov 2004
Location: Vacaville, CA
Posts: 2,272
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Re: I need some advice.
The front will swap no problem, you will have to drill 2 holes in the front. You can also make the rear work but if you have coil springs you have to get something to mount the panhard bar. I installed a 79 Chevy truck front suspension in my 67.
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#3 | |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
Quote:
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#4 |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
extd56...Thanks for the info. At least I know I can use the front.
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#5 | |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: I need some advice.
i did a 76 crossmember swap on my 69
if you look from the inside of the frame rail, there is 4 bolts going out towards the a-arms. the back two, and bottem front one will all fit no problem. its the front top one that needs elongated. i used a deburring bit on a matco die grinder for mine, and then put a washer on that bolt. other then that, the crossmember bolts in with no modifications. you will also need to use a disc/drum proportioning valve, and master cylinder. i left mine with manual brakes, so ill stay out of those details i ran 2 new front lines on my truck, out to the factory disc brake hose location. my 69 had the hole, even though they didnt put disc on untill 71 ![]()
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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#6 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,282
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Re: I need some advice.
Seems like I have read where someone put the 73 up axles in the older housing by using the backing plates and drums from the 73 up also. The bearing surface on the axle was wide enough for the bearing to still ride on it even with the longer length axle. Am I right on this or was it the 71,72 axles into the 68 back housing?
You can always use the complete 77 housing by cutting off the axle tube brackets and welding the 67-72 brackets to it and buy a track locator bar. The rear trackwidth will be a bit wider than the 69 but if you don't go to real wide wheels it might not be all that noticeable. Have you by chance measured the axle flange to axle flange of both rearends?
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross Last edited by Boog; 10-08-2007 at 10:53 PM. |
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#7 |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
Blue71....I want to use my manual brakes still. I would really appreciate if you have time to email me details...or post it here... about what I am fixin to do to myself.
Boog...I havent measured anything yet. When it got here on the hook...it was dark. I tried to start it...it didnt start. I didnt put alot of effort into that either. Tomorrow I will measure and see what I have and post it here.
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#8 |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: I need some advice.
ah ok, i guess i'll post them then. i figured i was in the minority using manual brakes
![]() in my experience, i highly recomend using a 71-72 proportioning valve, and master cylinder. on mine, i used the 76 prop. valve and master cylinder. the 76 master cylinder rod is WAY to short, and mine wont come out of the master cylinder. im planning to put on a new 71 master cylinder on soon, with the 69s original rod on the prop valve, the 76 one has 2 front lines coming out, and one rear line. 67-72s have 1 front line coming out to a junction block on the front crossmember, and one rear line. a 71 prop. valve will bolt straight in place of a 69, so you'll just need to replace the lines from the junction block instead of running them all the way to the master cylinder. im not really good at explaining this stuff so ill try to get some 69 w/disc conversion vs 71 w/factory disc pics tomarow when i put my 6 lug rotors on |
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#9 | |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
Quote:
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#10 | |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
Quote:
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#11 |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
I know I will get this done hopefully this week.
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" Last edited by caminokid; 10-09-2007 at 09:15 PM. |
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#12 | |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: I need some advice.
i didnt get home from work untill after dark tonight, but i did manage to get my 5 lug rotors off... i'm getting off at 5 tomarow, so i should get pics then. the 69 and 71 are sitting side by side
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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#13 |
Registered User
Join Date: Jan 2007
Location: fresno,ca
Posts: 448
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Re: I need some advice.
Are you swapping the entire front suspension or just the brakes? If you're just swapping the brakes then you'll need to use the '77's spindles, top ball joints and tie rod ends.
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#14 | |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: I need some advice.
ok here's some pics
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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#15 | |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: I need some advice.
one more pic
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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#16 |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
That sounds alot easier than taking the whole front end out of the truck.
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#17 |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
So theres no problem using the 77 master cylinder? I am hoping I will be better this weekend to work on this project. I had to push that 77 into the garage and I pulled a muscle. So I am in bad shape at the moment.
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#18 |
Chevy nut
Join Date: Jun 2007
Location: Springfield, Illinois
Posts: 2,266
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Re: I need some advice.
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84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!" |
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#19 |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: I need some advice.
with mine, the 76 master cylinder rod was way to short and wouldnt bleed correctly. i put a remanufactered 1971 master cylinder on it two days ago. man what a difference! i can stop now!
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#20 |
chrome makes it go FASTER!
Join Date: Feb 2007
Location: Cleveland Tennessee
Posts: 2,884
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Re: I need some advice.
[QUOTE=caminokid;2394405]going to steal the seat out of this 77
FYI- the seats out of 73-87 have a different mounting pattern, plus they sit really low. But it sounds like you're up to a little fab work! keep us posted.
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She can't cook and she won't clean. But she looks good in a skirt and she brings me beer. She can stay for now. EDIT:: But she left me anyway, So forget her. 1962 GMC Stepside V6 4 speed My rolling resto thread http://67-72chevytrucks.com/vboard/s...d.php?t=324226 My old farm truck http://67-72chevytrucks.com/vboard/s...=1#post3465005 |
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