Milling 273 heads

[salinasjoel]

I have a non commando 273 and was thinking of getting an extra set of heads to mill since I have access to equipment to do so and 273 heads can't be that pricey. Would there be any benefit to this? How much should I mill? The car has a edelbrock db4 and a carter avs, as well as a rv cam, dual exhaust on stock manifolds (early a so I'm working on a plan for headers). Not looking to burn through tires just something to do while bored at work. Thoughts

 

[RedFish]

Those are closed chamber heads already. Depending on how much lift the cam has, you might have valve head collision. Milling a lot off of a head can require intake milling too so... Mill on the ld4b too ?

 

[toolmanmike]

The HP version of the 273 uses the same heads as the low compression 2 barrel version. The pistons make the compression not the heads. If you mill the heads you will have a devil of a time getting the intake to fit unless you mill it too. Do yourself a favor and leave them alone. A nice cam, intake/4 barrel, and headers will make a difference as far as bolt on's go. tmm