hi everyone i am in the process of installing vortec heads on a 1969 model chevy 350 and wanting to know what to all look out for and some good tips. i have a mild .470 cam with long-tube headers weiand speed warrior air-gap intake holley 670 street avenger pretty much stock bottom end rebuilt except the installation of cast flat top pistons. right now i have some 76cc heads shaved all the way down to about 70cc with 3-angle valve job and mild porting on intake side. i am swapping those out for a set of 062 heads with valve job guides cut down to handle more lift and mild porting with new seals from a family known machine shop owner. i was mainly wanting to know roughly what size push rods to use. i dont know the deck height on the block i have the self-align rockers with the heads going to buy new push rods any info would be appreciated thanks