273 302 318 340 build

Love that look n sound Mike!
Before I pull 273 ill post a video for comparison to the 318.
So milling heads question... if I get them milled amd using adjustable rockers will custom pushrods be required? Or will the factory adjustables have enuf adjustment in them to use?
Does the 1.5 rocker ratio come into play here?

Thanks!
The HP273 cam specs were 248/248° .415/.425 48° overlap.
The Isky E-4 cam specs are 260/260° .425/.425

A great replacement cam for the HP273. It runs better than it sounds. I need to video that!