valve clearance is supposed to be good "with cams up to 255*duration at.050" lift"WOW!Ya don't see that every day!They attribute it to the fact that the intake valve is canted toward the intake,so the valve travels away from the cyl wall as it opens.....I'm still amazed by these heads....I mean come on...this would be easy to do with Yates heads,but then you're into $400 bucks for an intake and $1000 for custom headers!With these heads,you pull off your old Windsor heads,bolt your existing intake,headers,and rockers onto these and your makin like 80-90 more horsepower(over 100 in some cases if your original head was a low-performance production piece).For that kind of performance gain,you've typically needed a nitrous kit in the past,and last time I checked you don't have to 're-fill' your cylinder heads every 6-8 passes!
[addsig]