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#1
05-21-2009, 07:28 PM
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Re: 143 Blueprint Cam Install
That was true to a point.
For 1970 model production,Chevrolet used a more dureable BB valve spring that avoided dropped valves @ higher RPM. During 1968-9,they started to see an increase in BB warranty claims filed do to unreliable valve springs,so they used the stronger #3970627 to replace the weaker #3859911 spring. L-88's were exclusive to the #3916164 spring. 
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#2
05-21-2009, 09:24 PM
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Re: 143 Blueprint Cam Install
What springs do you guy's recommend ?I baby this thing but would like to twist it up if needed .
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"Knowledge is good" Emil Fabor 67 L/78 Camaro SS/RS H-H,1W,2LGSR,3SL,4K,5BY. (Sold) 70 L/78 Nova M-21,Black Cherry,Sandalwood Int. 09 Pontiac G8 GT Premium,Sport,Roof. Liquid Red.
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#3
05-21-2009, 10:20 PM
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Re: 143 Blueprint Cam Install
[ QUOTE ]
What springs do you guy's recommend ?I baby this thing but would like to twist it up if needed . [/ QUOTE ] Any modern made spring should be fine...they won't have to be anything special for a "stock" cam, so just call Comp/Isky/Bullet/whomever and they'll be able to fix you up. IIRC, in our L72s we're running the springs that came with the Gm/Crane blueprint cam on one engine, and a set of Comps in another...
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#6
05-29-2009, 01:27 AM
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Re: 143 Blueprint Cam Install
Got mine as well sometime before I went back to Phoenix last weekend. Haven't opened it yet as I was busy working on my 442, but much appreciated guys.
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Grady 
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