Valve Springs

[ask0329]

I have a gm 602 crate engine that I run in my IMCA Modified. I will be replacing the valve springs this winter and are looking for suggestions on wat to put in. Being legal or direct gm crate replacement springs does not matter as its in an imca mod. Looking for suggestions on a quality spring that will last as well as be an upgrade over whats in there now. (factory 602 springs) Any part numbers, brands, makes tensions, etc etc is greatly appreciated.

[stockcar5]

not sure if those heads will accept dual springs but if not i'd run a pac 1200 spring. they are 125 seat and 350 open. we run pac 1201's and have gotten 25-30 nights out of them turning 7400rpm.

http://www.racingsprings.com/Store/ProductView.asp?ProductID=228