Ok Camshaft experts here you go!!

youre losing me a bit aahahahha...its for a complete stock 300hp crate engine , but it as a 410 lift cam , its all stock rotating assembly , im just going with the best replacement for the discontinued 380hp camshaft
Pardon my ignorance, I'm a big block guy. Are those engines, the 300 and 380, flat tappet or roller?