I can get a set of assembled dart iron eagle heads for 500 bucks (for the pair). They have a 49cc combustion chamber and 2.020i/1.60e valves. I have a 412 small block with ****ty 882 heads on it. It also has a small edelbrock preformer cam. I do have a larger lunati cam sitting in my garage. If I bought these heads would I be able to use the big lunati cam? My engine also has dished pistons that keep stock compression (1978 motor). Holley street dominator intake. Holley 750cfm vac secondary carb.
This is the Lunati 07103 Cam:
RPM Range: 2500-6500
Specs are:
Adv. Duration: 295°/295°
Gross Lift: .534''/.534''
RPM Range: 2500-6500

I have high lift springs already. So how are the Dart heads and would they allow me to use this Lunati Cam?

 

Even with stockish 14cc dished pistons, 49cc chambers over a 4" bore is going to yeild a lot of static compression - In the area of 10.4:1 with a stockish 0.039" head gasket. If you can live with that, all you'll need to do is check valve clearances with the cam you intend to run. Since I know nothing about the metrics of the Dart heads you describe, I can't guess what sort of clearances you might have.

 

The cr will be way too high for pump gas.

 

Scratch that idea anyways, money is going towards a tranny. Thanks for your time though.
-Greg