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#1 |
How did I get this OLD!
![]() Join Date: Dec 2014
Location: Lamont County, AB, CANADA
Posts: 1,047
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Exhaust manifold question
Can I use the straight down exhaust dump cast manifolds on a 327 in a 67 C-10 coil spring truck without any crossmember conflict? I am having built a 327 to produce 300 HP and thought I should use corvette fuelie 2-1/2" manifolds. Any input is appreciated. Thanks
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1967 Oshawa built LWB Fleetside. 327,3 OTT, 515 Vermilion, CST, PS, PB, Shoulder Harness, Tach,Vac, Speed Warning, Choke Delete, Manual Throttle, Fawn interior. Dealer installed A/C 04/2015, N34 Rosewood Wheel 06/2023 Members who I have met personally. Metaldoc, chevnkevin, 62 Longbed, 72LHorn, 72MARIO, YBNORML, TBONE1964, Classic Bowties, Chevemall, Dagnabbitt. |
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#2 |
Registered User
Join Date: Jan 2010
Location: Here
Posts: 5,490
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Re: Exhaust manifold question
I have looked into it and in a 4x4 yes it's easy. I have seen 2 2wd trucks done but it is extremely tight and good luck getting it off when needed. The bend is very tight right off the manifold.
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#3 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust manifold question
There's plenty of room ,These are 2 1/2" rams, 350 in a 67 short bed frame.
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#4 |
Registered User
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Location: KINGSPORT,TN.
Posts: 3,035
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Re: Exhaust manifold question
Room if youove engine n trans back
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I BELIEVE IN JOHN 3:16 |
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#5 |
Senior Member
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Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust manifold question
This was a L6 I removed the 6 manual cross member and installed a factory V8 stock manual cross member and used stock V8 engine mounts in the front holes, There's room for 2 1/2" pipes .
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#6 |
Registered User
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Location: KINGSPORT,TN.
Posts: 3,035
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Re: Exhaust manifold question
6 and v8 mounts are the same - except rubber engine mounts - just in different locations. you use the 6 cyl location with a v8 and theres room but engine is back further
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I BELIEVE IN JOHN 3:16 |
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#7 |
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Location: KINGSPORT,TN.
Posts: 3,035
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Re: Exhaust manifold question
I also polished n trimmed my 2.5 vette manifolds, it sure makes em look good
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I BELIEVE IN JOHN 3:16 |
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#8 |
Senior Member
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Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust manifold question
I'm just setting mine up in the stock location . would there be more room if you used the 6 parts on the 8 ,Sure but it fits using the stock V8 parts
![]() LockDoc posted these pics last year . http://67-72chevytrucks.com/vboard/s...d.php?t=732393 |
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#9 |
Registered User
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Location: KINGSPORT,TN.
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Re: Exhaust manifold question
that pic is priceless, thanks. I,d really like to meet you grumpy. I,am in Kingsport.
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I BELIEVE IN JOHN 3:16 |
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#10 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Exhaust manifold question
So, did any small block 2wd trucks come with straight dumps or were they all from 4wds? My experience is mostly with 4wds and I assumed all 2wds used curved. I have some manifolds I need to identify, curved/straight and with/without alt/ac mounts
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#11 |
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Location: KINGSPORT,TN.
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Re: Exhaust manifold question
2wd is all curved
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I BELIEVE IN JOHN 3:16 |
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#12 |
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Location: Vancouver, Washington
Posts: 1,644
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Re: Exhaust manifold question
This a good article to look through on the subject. I contacted the author to confirm that the straight down Tru Ram manifolds fit ok.
http://www.hotrod.com/articles/1112c...et-c10-engine/
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1968 Chevrolet C/10 LWB - 327, TH350 - 4/5 Drop |
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#13 |
Registered User
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Location: KINGSPORT,TN.
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Re: Exhaust manifold question
those arnt gm manifolds...... in that article.
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I BELIEVE IN JOHN 3:16 |
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#14 |
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Join Date: Jan 2017
Location: Larkspur, Colorado
Posts: 916
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Re: Exhaust manifold question
One other thing to think about, I don't know if the Vette left manifold has the alternator mount holes but if it doesn't you could run into an issue using the stock 67 C10 alternator brackets. If you're cylinder heads have both holes on the end you could use the 71 72 truck alternator bracket set up that bolts to the head that way keeping the original short water pump set up.
Steve weim55 Colorado |
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#15 |
Senior Member
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Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust manifold question
^^ That's what I did .
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#16 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Exhaust manifold question
I got a set of Sanderson shorty headers from a member who had them on a C/10. I trust him, but does that sound possible? Would the engine have to sit back in the 6cyl mount holes?
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#17 | |
Senior Member
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Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust manifold question
Quote:
https://www.sandersonheaders.com/san...el-camino.html |
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#18 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Exhaust manifold question
These are block hugger style, center dump.
Also, when you guys smooth the manifolds, do you mean just all the nubs and such or do you take ones with cast brackets and cut them out and smooth?
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 06-12-2018 at 10:04 AM. |
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#19 |
Registered User
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Location: KINGSPORT,TN.
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Re: Exhaust manifold question
both
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I BELIEVE IN JOHN 3:16 |
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#20 |
Senior Member
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Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust manifold question
A few pics from a 7 year old thread on 2 1/2 install
http://67-72chevytrucks.com/vboard/s...=440965&page=2 |
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#21 |
Registered User
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Location: KINGSPORT,TN.
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Re: Exhaust manifold question
if you use tight mandrel bends and tig it all together you can do a nice job but it takes time, fitting etc. it also helps if you wrap the p/s pipe next to starter to keep heat soak out of it. there is no performance gain to 2.5 except for hi-compression engines. lastly make sure you can get starter off and on
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I BELIEVE IN JOHN 3:16 |
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#22 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Exhaust manifold question
Thanks again. I may smooth up on some old style ones I have if no one wants for original restoration.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#23 |
Registered User
![]() Join Date: Nov 2006
Location: KINGSPORT,TN.
Posts: 3,035
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Re: Exhaust manifold question
blast them inside n out then have them surfaced flat, then see if you have to elongate mounting holes then polish. bbq grill paint does real nice also
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