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Re: Plan for 5.3 build
Do you mean stock truck intake manifold? or exhaust manifolds?
If you mean intake that is fine the truck intakes flow quite well. If you mean exhaust manifolds, I would consider headers instead. They will be worth decent power with a cam and 243 heads.
If you have an older lower performance 5.3 with dished pistons then milling .030 off the 243 heads will put compression back to stock levels. On a newer/HO 5.3 with flat top pistons milling the heads .030 will give a nice compression bump.
Over all it should be a pretty decent performer with any of the above possibilities.
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