pushrod length/measuring question

Look or call 440 source they'll have the single check pushrod.
I'd Probably advise trickflow 240 or 270 heads to start for making great power. Sounds like a nice build.
Thanks man!
I was thinking those but none available at all eh. I known of a set of Stealth heads locally for a deal, used but not many miles on them and only two years old. But would like MW port heads.

-Shiny