I have a set of heads I got with a project but going with ls1. The only thing I can tell u about the heads is what I had a local hot rod shop tell me about them

They are an older set of spread port 23degree heads that have been milled to 58cc and Ported. They have 2.02/1.60 valves and solid roller springs for a 600 lift cam. These heads are complete,fresh and ready to bolt on. 

The heads where also flowed and a picture of the flow numbers have been listed as well

Asking $850 Obo 

910-587-nine22eight