older iron eagles and cam lift ???

[team taz]

Need some pro help and advise

I have a chevy 383 with some older iron eagles, say older than 5 years. I have a comp cams XE274 cam (274-286) duration and (490-490) lift. I also have 1.6 ratio rockers. I was told max lift for these heads was .500.

I am looking for more duration and lift, can anyone steer me in the right direction.
I was looking at a new thumper cam at (295-313) duration and (.5- 486) Lift. should it work with my 1.6 rockers?

Thanks guys.

[lun40119]

Without knowing the part number or spring diameter it would be hard to answer that...........that being said you will need different springs for a cam like that anyway, get a new cam and springs together and have fun :D

[Awesome Bill]

If the spring will take the lift and be within the open pressure, then it will be fine. Your only adding .030" max to the equasion!