I have factory 5.3 862 casting heads have been hand ported and polished with 5 angle valve job with 2.02 lingenfelter valves the flow equal to ls6 heads I think was 265 at .600 I had papers but they disappeared somehow would be great for ls1 to raise compression and flow they only have 3k on them since the work I built a different engine so new set up 300 plus shipping for pics text at 804-761-7250 springs not included

 

Please text if interested it wont let me respond to pms now

 

Bump alot of interest but still here if serious text do not pm its to hard to check that 804-761-7250