The L2295's are only around 10.3:1 with their domes intact on an 88cc 452 head and .039" gasket.... assuming NO excessive Block Milling etc.? because they are built on a 2.029"C.D.,about .055" downhole @ TDC.
So given the above, and the fact that your domes are milled off, I would suggest more probably, you may currently be as low 9.3:1for compression instead of anywhere near 10:1 ?

As a general rule, many don't like Aluminum Heads at lower compression ratios, and it may be adviseable to run your Cam events against a cranking pressure test first, before entertaining an Aluminum head purchase to "see" what you are working with ?

ANY aluminum head ie: stealth /sidewinder, etc., is a flow improvement over any factory cast iron...
that said,
if you are indeed as I suspect down around 9.3:1 for C.R. ? and with the Piston .055" down the hole making quench up around .095"(.055"+ .039"gskt)... just say'in.... the benefits to the investment therein may be very limited in a head swap.

The L2295's are only around 10.3:1 with their domes intact on an 88cc 452 head and .039" gasket.... assuming NO excessive Block Milling etc.? because they are built on a 2.029"C.D.,about .055" downhole @ TDC.
So given the above, and the fact that your domes are milled off, I would suggest more probably, you may currently be as low 9.3:1for compression instead of anywhere near 10:1 ?

As a general rule, many don't like Aluminum Heads at lower compression ratios, and it may be adviseable to run your Cam events against a cranking pressure test first, before entertaining an Aluminum head purchase to "see" what you are working with ?

ANY aluminum head ie: stealth /sidewinder, etc., is a flow improvement over any factory cast iron...
that said,
if you are indeed as I suspect down around 9.3:1 for C.R. ? and with the Piston .055" down the hole making quench up around .095"(.055"+ .039"gskt)... just say'in.... the benefits to the investment therein may be very limited in a head swap.
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Good info Challenger340. My heads are milled .020" and the block is square-decked another .040" if I remember correctly. It knocks like crazy on 91-octane, but OK on 93-octane. I would love some aluminum heads, but I'm thinking they're not for me.

What would the larger intake/exhaust valves do for me? I've heard larger exhaust valves are a big plus for nitrous motors. Would my hardened valve seats need to be re-hardened or inserts put in if I put in larger valves?

IMO, if you have to pay for new valves and the associated labor to install them, then do some blending, so you actually see some benefit from the bigger valves, then I'd just spend a little more and get new aluminum heads.
A set of Stealths or Sidewinders with a little clean up would come in at around your $1500 budget.

The 452 is an open chamber head so you forgot to include the depth of the open part of the chamber in your calculation ... add at least .100 , probably more like .110.

Without any bowl work ... lighten your wallet and not much else.

Talk to Dwayne about heads , he'll send you in the right direction.

Just get the sSealths from 440 Source. $500.00 per head ready to go.I believe that right now shipping might be free.

The stealths do have free shipping. If you have $2000 buy the CNC stealths and be done. Those are the heads I am buying when I build my 512

Cutting to the chase here....
IMO, your best option is to just spring for some Stealths or Sidewinders.

By the time you rebuild a set of cast iron heads, by anybody any good, done PROPERLY.... you have spent what the Stealth or Sidewinder would cost anyways ?