milling heads for comp ratio increase

I put you cam specs in a calculator and worked out what is called DCR.. dynamic compression ratio. It is an indicator of low end torque. The DCR works out to the range of 7.1 or 7.2 depending on exactly what advertised duration one assumes based on the slow ramps on this cam. That is not much different than a stock 318.

No, I don't think this will be a good cam down to 1800 RPM. More likely 2800-3000 RPM. So for me, this would be too big on duration for a good street cam; I think it will be a little bit doggie when you first move out, regardless of how well it is tuned. Not awful with your lightweight ute, but it won't light up the tires when you first push on the throttle. And fuel mileage will be poor with the small LSA.