I have a set of LT1 heads that I used on my 383 for a short while.  I had them ported and refreshed with all new components.  They have about 6k miles on them.  Casting number is 10128374.  They have stainless valves and heavy duty dual springs.  I cleaned them up so they are ready to go.  Valve sizing is stock and I have a new set of uninstalled valves if you want them.  I also have a set of 1.6 RR's for $50.00 if you want them also.  You will need guide plates however.  Otherwise, I do not have rockers that will work.  No flow numbers.  3 rockers have slight body scar on them, but fully functional.
Heads Ported + rockers cost me $1100.00
Asking $400.00 for the heads / $450.00 Heads + Rockers 
Thanks, Giovanni
201-523-0591
G.Araneo@gmail.com