I just noticed that the Meinier Snake geometry chart is based on a 530mm axle-to-crown fork length (e.g., a 120mm travel FOX fork). So, when using a shorter 100mm fork (with a 503mm axle-to-crown), the head tube angle is approximately 68.7°
Up to now i didn't find frames that with modern geometry for 100mm travel fork, threaded BB, UDH and post mount brakes