4.3 cam
06-08-2011, 09:50 PM
#2
On The Tree
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depends on lift. anything over .500 lift the vavle guides need to be machined. i had a '98 zr2 s10 that i stuck a 266HR comp cam in... i also ported the heads and intake manifold, had a custom tune (had to do it becuase of the cam) and had to have the vavle guides machined... that truck would hual ***!
06-08-2011, 11:27 PM
#3
Staging Lane
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yeah anything worth doing is going to require head work .....valve guides need to be clearanced and stiffer springs for the extra lift. I put a smaall cam in 2000 silverado 4.3 and it made a difference, not a earth moving difference but a difference nonetheless.
09-14-2011, 08:43 PM
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depends on lift. anything over .500 lift the vavle guides need to be machined. i had a '98 zr2 s10 that i stuck a 266HR comp cam in... i also ported the heads and intake manifold, had a custom tune (had to do it becuase of the cam) and had to have the vavle guides machined... that truck would hual ***!
So in your case, Id call comp or other companies and inquire about your heads and if their springs will work or if your can use some Ls6 springs.
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