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5.3 build

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Old 03-27-2011, 07:01 PM
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Good god! I know where you can get brand new GM 243 true ls6 heads for $474 each with free shipping! (hollow stem intake and sodium filled exhaust)
GM Part# 12564824 with valves and springs installed.

PM me if you need to know where!
Old 03-27-2011, 07:56 PM
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Originally Posted by remauto1187
Good god! I know where you can get brand new GM 243 true ls6 heads for $474 each with free shipping! (hollow stem intake and sodium filled exhaust)
GM Part# 12564824 with valves and springs installed.

PM me if you need to know where!
You can get CNC ported 243 heads that flow 300+ cfm for $1150 per pair from Texas Speed. While they don't have the lighter valves, they aren't much more. I think it is money better spent.
Old 03-27-2011, 08:18 PM
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Originally Posted by speedtigger
You can get CNC ported 243 heads that flow 300+ cfm for $1150 per pair from Texas Speed. While they don't have the lighter valves, they aren't much more. I think it is money better spent.
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Old 05-21-2012, 03:03 AM
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I'm also planning to rebuild my 5.3 in my 2005 Crew and while I was planning on what parts to use, I have just one question; Will an LS3 cam work in my 5.3 with no problems?
Old 05-21-2012, 05:05 AM
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Originally Posted by Daryl T
I'm also planning to rebuild my 5.3 in my 2005 Crew and while I was planning on what parts to use, I have just one question; Will an LS3 cam work in my 5.3 with no problems?
If you have the single bolt cam style motor now it should work. I can't remember if it was after 2004 or 2005 that they switched over from three bolt cams to the single bolt style in the trucks.



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