The right pushrods?

I don't think you can go by the stock pushrod length. If I remember right the stock ones are too long in comparison to the adjustable ones because the adjuster takes up some length.

If the block and heads haven't been milled a bunch you can probably just use the Comp Cams pushrods for hyd. lifters with adj. rockers. That's what I did and it worked out good. I think the part# is 7821-16 but I'm not positive. You can find them on Summit. If I remember correct the ones for hyd. lifters are 7.234 long.

If your heads and/or block have been milled you do need to measure them to find out what length you need.