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jims48 02-11-2013 04:08 PM

Small block chevy spark plug routing
I am new to the forum. I am looking forward to sharing information and gaining some new knowledge and insights to the hot rod side of the hobby. I am looking for some guidance on routing spark plug wires in my 48 Olds. I have a small block chevy with a 1974 block. The previous owner used cable ties. I am looking for looms or shields that will work with rams horn exhaust manifolds. The 74 block I have does not have holes in the block to fasten the older shields. Anyone have any suggestions. Pictures would be helpful. Thanks

delawarebill 02-11-2013 05:17 PM

plug wires
have u tried the ones that are held down by the 2 bottom bolts of the valve cover.. more wire separators then anything..

jims48 02-12-2013 05:39 AM

Thanks. Your suggestion is a possibility, but I was hoping to route the plug wires under the exhaust manifolds.

malc 02-12-2013 06:03 AM

This is tidy for me, going under the headers the wire will drop when you remove it from the plug.
This way I never mix up plug wires and you can remove the dist. cap and wires all in one lump.
R&M Billet Wire Looms 1102K

jims48 02-12-2013 05:35 PM

Thanks. I will look into this option as well.

1971BB427 02-13-2013 09:28 AM

As you probably know, going above with plug wires and rams horn manifolds means the wires will get cooked where they lay on the exhaust. Best to keep them underneath as you planned, and use some brackets to drop down from the lower valve cover bolts.
You could get something like the Mr Gasket wire loom adapters #9870, and then instead of using the small 90 degree brackets to mount them above, make small aluminum sheetmetal brackets to locate them below the rams horn exhaust. Or just make the sheetmetal brackets to drop off the valve covers and tie the plug wires to a hole in the fabbed bracket. The aluminum sheet is easy to bend and cut into strips, and gives a nice finished looking support.

jims48 02-13-2013 04:02 PM

I like that idea. I checked out the Mr. Gasket looms. I can easily fabricate some aluminim brackets. I also like the idea of fabricating a couple brackets to drop down for fasteners. It is a little cold here yet and I have the exhaust manifolds off. As it warms up, I will try and make something that looks clean and works. When I get done, I will post some pictures. It may be something someone else can use. Thanks for the suggestions.

vht 02-13-2013 07:16 PM

Jeg's has wire looms for under header routing. May be what you need. Anyone else that needs the long alum wire looms like mentioned above, google White Performance engines, they have alot of stuff like that. I got a 31 in alum rad for $110 that is real nice. Sharp fab polished valve covers for my sb chevy for $72 including shipping.

jims48 02-14-2013 07:49 AM

Thanks. I will check out JEGS too.


bigdog7373 02-14-2013 03:07 PM

Yea jegs will have what you need.

rickman2k 02-20-2013 09:24 PM

mine go down the tops of the valve covers

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