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vortec heads are a HUGE improvement over previous heads. Vortec heads make more power than almost any other factory chevy head before them.
and they got better mileage.
big caveat - be careful about ignition timing. they do NOT like nearly as much ignition advance as previous heads.
I was running roundy round around the year 2000. I had a guy build me a pair of heads for 800 dollars for the pair of heads, including new bare castings, valves, port work, etc.
It made as much power as the iron DART heads with over 2600 dollars of work done to them.
Vortec is cool stuff, until you look at the 5.3/6.0 heads.
Then the old vortec heads are JUNK. 5.3 and 6.0 make BIG power, great mileage, all around very cool stuff.
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