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| | | | Joined: Aug 2000 Posts: 1,438 'Bolter | | 'Bolter Joined: Aug 2000 Posts: 1,438 | As I inch may way along...I have an old Edmunds intake that I want to put on my '60 235. I have 3 centering rings for the intake. These are stepped for adapting an earlier intake to the late 235. Problem is the intake bore is too small even for these. The inside diameter of the centering ring is about the intake bore side. I assume there is yet another size centering ring for my manifold (Edmunds). If so, does anyone know of a source for these? The only other thought I have is to bore out the intake to accept the centering rings I have.
40 Chevy 1/2 ton
| | | | | Joined: Sep 2003 Posts: 1,820 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 1,820 | Dennis - I think it is best to bore the intake ports and use the later rings. That way everything lines up as close to stock and as slick as possible rather then having two or more steps. It may cost you a little more to have the intake bored, but I think you will be happier with it in the end. Joe 
"Truckin' Around .......... Since 1937!" My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.Operators are standing by to take your calls! Now cruising in the Passing Lane | | | | | Joined: Aug 2000 Posts: 1,438 'Bolter | | 'Bolter Joined: Aug 2000 Posts: 1,438 | Thanks Joe. Any suggestions for boring it out? I would guess I would have to have a machine shop do this. I don't think I could open it up precise enough to not have leaks. I'm sure someone has adapted one of these to a late 235. What did you do?
40 Chevy 1/2 ton
| | | | | Joined: Dec 2002 Posts: 571 Shop Shark | | Shop Shark Joined: Dec 2002 Posts: 571 | I took a scap piece of plywood and drilled holes where the intake ports are of the head. I then used a pattern cutting router bit (the kind with the bearing on the bottom) and used the cyl head ports as a guide to cut the plywood ports. I then used THAT as a guide for my router, with a bearing on top bit, and cut the intake to match the head. A bit tedious but it was fun and I did it myself. I gooped it up with some high temp RTV at assembly and cut the excess off afer it dried. Leak free after about 2000 miles now. Good luck
Last edited by Shipwright; 01/05/2008 1:31 AM.
| | | | | Joined: Sep 2003 Posts: 1,820 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 1,820 | I had a machinest enlarge the ports. Most can do it fairly easily. Joe
"Truckin' Around .......... Since 1937!" My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.Operators are standing by to take your calls! Now cruising in the Passing Lane | | | | | Joined: Aug 2000 Posts: 1,438 'Bolter | | 'Bolter Joined: Aug 2000 Posts: 1,438 | Hmm. I think I'll give the router a whirl. Sounds like fun Shipwright. Thanks for your suggestions.
40 Chevy 1/2 ton
| | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | DennisM, I've ran that 216 intake on my 261 with no trouble without the ring. A muffler shop could make an adaptor ring stepping up from small hole to larger, just using exhaust tubing. | | | | | Joined: Aug 2000 Posts: 1,438 'Bolter | | 'Bolter Joined: Aug 2000 Posts: 1,438 | Thanks everyone. I now have the step rings in place. By the way, the step is on the outside so it is a smooth path as far as the air is concerned.
Now on to the next step.
40 Chevy 1/2 ton
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