Pushrod length is specific to your car, you can't just get what somebody else is using. The correct length and rocker arm geometry depends on a lot of things, like the rocker arms themselves, the spring/valve height, cam grind, etc. The right way to figure it out would be using a pushrod length checking tool. Or you could try to guesstimate, sometimes if preload is only off by a little bit you can just go one size longer or shorter as needed, typically universal pushrods come in increments of .050".