I agree with the recommendations of 10W-30, 0W-40, and 5W-40. Mobil 1 FS Euro 0W-40 is a decent shelf choice. Unless the bearing clearances are obnoxiously wide (>.0035"), there's no reason for a 50 grade oil.
Quite radical solid rollers indeed. The neat thing to me about those engines is the lack of a harmonic damper. The use the dry sump pump as the damper, bolted directly to the cam snout. It works better than any damper out there and is the reason they can run such radical cams without tearing it apart.
Not my intention to hijack a thread. The point was 5w40 (with the right additives) in a properly built small block will get you pretty far. 5w30, 10w30 5w40, 10w40, and 15w40 will all be good choices based on climate. These are absolutely solid roller. Quite big cams for the winged cars as many tracks they run flat footed
Quite radical solid rollers indeed. The neat thing to me about those engines is the lack of a harmonic damper. The use the dry sump pump as the damper, bolted directly to the cam snout. It works better than any damper out there and is the reason they can run such radical cams without tearing it apart.