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#1 |
Senior Member
![]() Join Date: Mar 2019
Location: Somonauk IL
Posts: 324
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292 exhaust manifolds
I’m currently swapping a 292 in place of a 250. 68 Truck originally had a 250. The 292 I have has a 3” 3 bolt triangular exhaust manifold flange. This causing a problem since the truck has a 2” 2 bolt flange.
From the research I’ve done I should be able to use a 250 exhaust man that will fit a 292 head and then mate to the OEM exhaust. Did the 292 come with different exhaust manifolds based on what size the truck was? C10/2030 - 2” manifolds: c50/60 3” manifolds? Posted via Mobile Device |
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#2 | |
Senior Member
![]() Join Date: Mar 2019
Location: Herculaneum MO (20 minutes south of St. Louis
Posts: 613
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Re: 292 exhaust manifolds
Quote:
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67 C10 283 T5 swapped longbed fleetside = wife's daily driver 67 C20 292 (originally a 250)4speed longbed fleetside w/original wooden bed=my project truck 67 C10 283+.060 (so a 292 as well)T5 swapped longbed fleetside=my DD 72 C1500 Sierra Grande 350 TH350 longbed fleetside=wife's fair weather truck Can you tell we are fans of longbed fleetsides & 67s Chris |
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#3 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,216
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Re: 292 exhaust manifolds
You are exactly right. The larger manifold came on the larger trucks. 1 1/2 tons & up. The 250 manifold will fit the 292 engine but the larger manifold is better. The small manifold is restrictive on a 292 engine. It causes warpage & cracks in the smaller manifolds.
You will need to fab a exhaust pipe extension or have a muffler shop make it up. George |
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#4 | |
Senior Member
![]() Join Date: Mar 2019
Location: Somonauk IL
Posts: 324
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Quote:
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#5 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,255
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Re: 292 exhaust manifolds
I have been running Clifford headers since 1978 on my '68C/10 Stepside, but my Calif-stock 292 was originally equipped with the same exhaust package as a 250, Plus A.I.R.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#6 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,858
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Re: 292 exhaust manifolds
My opinion is go with 12bolt.com manifolds. Best exhaust setup I feel for any Chevy inline six.
https://www.12bolt.com/store/p153/Ex...0-250-292.html
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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