My home inspection of Speedmaster heads

I’m a self taught engine builder, Head porter that can’t afford machine shop equipment or paying someone to do my stuff. Or the time to wait for them to do it when they feel like it. My old school valve jobs and hand lapped valves have hurt a lot of professionally built engines feelings at the track so I’m not sold on the best of the best idea. Just stick with what you can afford and go out and have some fun.