Six Pack question

K.O. SWINGER said
Good catch I stand corrected I always look for the lettering or lack of on the thermostat crossover passage not seeing any I assumed it was an Edelbrock factory manifold my bad (port away)

That's what I did with the same type. I sold a real or over the counter one that had value to someone else. And got one to modify. I know I posted these pics before but I cut the machined area's into a a rounded shape. I did ruin a real one before, but refrained for doing so again.