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Mod | | | Forums66 Topics128,039 Posts1,055,473 Members48,424 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: May 2013 Posts: 4 New Guy | | New Guy Joined: May 2013 Posts: 4 | Ok. I have a 1961 C60 with the 261 engine. I pulled the intake and ex manifolds to replace gaskets. Well the exhaust manifold was warped and cracked. Found some used Fentons to install. My question is about the pins at the front and rear of cylinder head, should I pull them and prep the holes for studs so I get better clamping power? Or is this advised against. This is my first Inline engine and it looks to me that a fastener at the ends would help. I also want to install studs in the head as opposed to bolts when I install my manifolds. I am getting read to order a Clifford Intake as well. | | | | | Joined: Sep 2006 Posts: 2,393 Shop Shark | | Shop Shark Joined: Sep 2006 Posts: 2,393 | The pins you refer too are screw in studs. They should back out. Many owners including me have replaced them with threaded studs to insure a tight fit manifold. Make sure your Fentons have a
straight and flat mounting surface too.
Drew
| | | | | Joined: Feb 2000 Posts: 5,195 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,195 | On the 250, the two end studs are threaded in to water ports and need to be thread sealed. Be sure to check your engine for this.
Joe | | | | | Joined: Aug 2012 Posts: 566 Shop Shark | | Shop Shark Joined: Aug 2012 Posts: 566 | What about the 1956 235 truck block are the pins screw in studs? I do not want to assume anything.
"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my sweet ride." -Amen 56 Chevy 3100 | | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | They are screw in for a '56 235. | | | | | Joined: May 2013 Posts: 4 New Guy | | New Guy Joined: May 2013 Posts: 4 | 1961 261 end pins are threaded. For anyone else asking the same question. | | | | | Joined: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | For anyone else asking the same question, all of them were screwing studs.
dg
Denny G
Sandwich, IL
| | | | | Joined: Nov 2010 Posts: 1,159 Shop Shark | | Shop Shark Joined: Nov 2010 Posts: 1,159 | I have Fenton's and a muffler shop installed them. I needed custom made "head' pipes for my "stacks". This question pertains for the "Do-It-Yourselfers: Are the 235,261 studs threaded in to water ports,like the 250/292's? If so,what years? THANKS!!
Last edited by wetwilly5757; 09/21/2014 6:58 AM.
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I know of no Chevrolet six before 1962 that is open to the water jacket on the manifold bolts.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Nov 2010 Posts: 1,159 Shop Shark | | Shop Shark Joined: Nov 2010 Posts: 1,159 | THANKS,Dave!Good to know. | | |
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