Pick your cam first, then get lifters to match...
273's had factory solid lifter cams and adjustable rocker arms from the factory from 64 - 67...
in 68-69 they had the same hydraulic cam as the 318...
Figure out if you are going with a solid or hydraulic cam and get lifters to match...
If you go with hydraulic, I recommend using the standard Rhoades part # 2018
They bleed down at idle and tame down the cam. At idle they take out about .025" lift and 10° duration from the cam. They give more vacuum, fuel economy, and low and mid range torque and HP without sacrificing top end. I've used them for years and they perform well...
Here's their main page:
Rhoads Lifters
Read the second article here:
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