i have a set of e7te heads that i am thinking of porting out...my question is how big of a lift will these heads handle with a set of aftermarket springs ? i was told that they wont handle over .500 cuz the valves are too short. is this true? im looking to put a 286/294 duration cam with .536/.542 lift...is it possible?

 

Talk to Mike at Thumper Performance, he works with these heads day in day out and will be able to answer all of your questions and can provided you with the correct parts.
http://www.thumperoforangepark.com/