pushrod length

[Footjoy]

freshening up a 350 vortec. I have LT4 hot cam and 1.6 rockers how do I determine the pushrod length? Vortec heads have been machined with bigger springs and the pushrod holes have been notched for 1.6 rockers.

Thanks

fj

[Lowend]

http://www.compcams.com/information/Products/Pushrods/