Thanks for your military efforts.
Focus on staying safe as you serve.

Regarding 273 stuff....No hope at all...My


You didn't say what your HP goals are.

Put all on the 273 stuff on the shelf and build a 360 or stroked 360. If if came with the nice 273 Commando valve covers, use them on your new build. You should be able to find a 360 core for a couple hundred or less.

Before you sink any $$$ into those heads, take a look at the Indy/RHS iron heads.

It is hard to go wrong starting with a 360 or 408.
It is very hard to recommend building a 273.

Building a 360 based motor = Parts are easier to obtain and the HP is automatically there.
Consider that 408" = 135 extra cubic inches at the same weight penalty.

Good builds to consider:
Brian @ IMM engines
https://board.moparts.org/ubbthreads/showflat.php?Cat=0&Board=Racer&Number=5791384
Drag Strip results: https://board.moparts.org/ubbthreads/showflat.php?Cat=0&Board=Racer&Number=5861879

Jesse Lackman
https://board.moparts.org/ubbthreads/show...rue#Post4070225

Qwkmopardan has some awesome budget builds:
https://board.moparts.org/ubbthreads/showflat.php?Number=5455580&page=0