Quote:
Originally Posted by Tom
No, he doesn't. He needs the valve guide boss machined down. Springs are same seat diameter he doesn't need to modify them. Comp cams sells the tool. Stick it in your hand drill. Do it at home. Easy peasy. Cam spec wise he isn't even getting the intake to max flow lift and exhaust is right there, looks like an excellent match for vortec heads. They max flow at .500" lift intake then stall over it. Wheres the problem?
As for screw in studs, lift isn't really the problem its spring pressure.
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Mine needed to be cut. opened up ..larger dia..
and guides cut.. and studs machined.. drilled tapped..
At this point you might as well go straight to, either buying the Sd heads or pace performance g.m. vortecs.. or the large port g.m. bowtie vortecs..
or just going straight to the e tech heads.. and getting all the good without the iron ..
I love the g.m. vortecs.. as more cast aside them because of a crack and I get a bunch of free parts.. The heads on my daily have 150k on a set of cracked,junked heads..