500 lift on the intake, which isn’t much more than a set of Vortecs that flow somewhere between 219 and 229 CFM on most benches. The heads you picked are probably the best out of the box heads you can get new right now for a 305, but pricey. I think throwing on a set of Vortec heads and performer intake, along with a set of headers and cam on/in the 305 is a killer way to get good power at a good bang for the buck. The airgap intake, if purchased, would require EGR deletion anyway to avoid an MIL. I have a burner and tuner and have burned some new OBD1 EFI chips.

I could theoretically also burn a new PROM chip if necessary. 500 lift, headers and true duals? There's no sense having to buy a new carb, fuel system, ignition system, and an alternative converter clutch lock-up for a 305 build. Is it likely to play nice with those heads, a cam of something around a 112 LSA 218 cam with around. I don't want to buy the wrong thing here.Īlso I'd prefer to keep the Q-jet and CCC system. But it seems odd to list it as 'max valve lift' when that is a function of cam lift AND rocker ratio. My thinking is this spec is the maximum spec of the what the cam lift can be based on a 1.5 ratio rocker, but it doesn't say. What's got me is that it lists the maximum valve lift at only. Anyhow, the heads I've been mulling over are something like this: The necessary spreadbore version runs $315 and the factory L69 aluminum piece is probably not any worse than a conventional Performer/RPM. Was thinking about putting in back in with a set of aluminum heads, a mild roller cam, and possibly an Edelbrock Performer Airgap intake. Resealing and cleansing the grease ball basically. It was leaking oil and fuel pretty profusely everywhere.

Max cam lift on stock 350