I have a two sets of large oval port heads that were fully ported by Lingfelter performance. They were on 540s that were 8.7 : 1 compression and made 625hp with a single 4 barrel and a hyd roller cam on our SF902 dyno. They would work great on a 454 or 502 also. The chambers are 119cc and the valves are 2.250 and 1.880. I put all new s/s pro flow valves and springs on them when they had a valve job 80hrs ago. The intakes are also fully ported and match the heads, they are high rise single plain. The heads are steel and the intakes are aluminum. The heads need nothing bolt them on and go. Any questions please ask. I want 1,800 per set and that includes an intake. Thanks, Jeff