350 Spark Plug Heat Shields - The 1947 - Present Chevrolet & GMC Truck Message Board Network

learyw · 01-25-2019, 01:57 PM

I'm putting in a new crate 350 in my 1978 K20. I was going to switch over the original spark plug heat shields from the old motor onto the new crate but one of the four is too badly damaged to reuse.
1. How important are they? Someone told me new spark plug wires are better and the heat shields are less important. Not sure that sounds right... Anyone run engines without them? I have the original cast iron exhaust headers.
2. The heat shields are also very hard to install since the exhaust manifolds are in the way. I have seen some people that have "two piece" ones that would be way easier. They look like JEGS Part Number: 759-DESPB12 but Jegs said they wouldn't fit my Gen 1 350. Thoughts? Thanks! -Will

learyw · 01-25-2019, 02:45 PM

Sorry, posted this in the wrong place and cant seem to figure out how to delete it.

**1rippen6** · 01-26-2019, 09:28 AM

Go to edit and pick advanced setting, there you should see a delete option. Hope that helps.

01-25-2019, 01:57 PM	#1
learyw Registered User Join Date: Dec 2015 Location: Westminster, CO Posts: 26	350 Spark Plug Heat Shields I'm putting in a new crate 350 in my 1978 K20. I was going to switch over the original spark plug heat shields from the old motor onto the new crate but one of the four is too badly damaged to reuse. 1. How important are they? Someone told me new spark plug wires are better and the heat shields are less important. Not sure that sounds right... Anyone run engines without them? I have the original cast iron exhaust headers. 2. The heat shields are also very hard to install since the exhaust manifolds are in the way. I have seen some people that have "two piece" ones that would be way easier. They look like JEGS Part Number: 759-DESPB12 but Jegs said they wouldn't fit my Gen 1 350. Thoughts? Thanks! -Will __________________ 1978 K20 Camper Special, stock 350, TH400, np203, 265/75R16, GMC 10.5" rear, Dana 44 front 3.73, Q-jet. Last edited by learyw; 01-27-2019 at 11:13 PM. Reason: Id like to delete the post since it is in the wrong place.

01-25-2019, 02:45 PM	#2
learyw Registered User Join Date: Dec 2015 Location: Westminster, CO Posts: 26	Re: 350 Spark Plug Heat Shields Sorry, posted this in the wrong place and cant seem to figure out how to delete it. __________________ 1978 K20 Camper Special, stock 350, TH400, np203, 265/75R16, GMC 10.5" rear, Dana 44 front 3.73, Q-jet.

01-26-2019, 09:28 AM	#3
1rippen6 Senior Member Join Date: May 2011 Location: Greencastle PA Posts: 6,799	Re: 350 Spark Plug Heat Shields Go to edit and pick advanced setting, there you should see a delete option. Hope that helps.



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