67' Barracuda 273 (Camshaft Results at the Track)

Stroker,

Not saying it can't be done,,,,

The 'stock' 273 Commando has a Single-Coil Valve Spring with 'no damper'.

And the original 'Lifters' are 'Hourglass-Shaped' and would usually 'split' at
High RPM's.

Not saying I'm the so-called expert, but we ran enough 273 Mopar's from
1967 thru 1972 to know what they could and could not do.