Go for it just done mine but mine only does -1000 miles year. Oil is manufactured by tesco and they put Asda's badge on it HAHAHA. Don't worry any oil is better than no oil
You could still make it happen in a different location. Just done 5 nights on the east coast got back today it's all aload of crap I no it's not but it's out of control people don't give a flying f$%^
What a lot of people don't relate to is a chevy 350 4 bolt mains is in my eyes the best engine in the world. 3 / 5 k for a crate motor in my younger years i spent a bit of time in motor city ( Detroit)
I've owned a few v8s and my c5 Corvette is still the best car I have driven and owned. Petrol was never an issue mileage per gallon.
And I think your build is awesome and enjoy.