[GriffTannon]

I have a set of 350 heads I am thinking about reusing for my rebuild. They came originally with 1.72/1.50 valves. Should I keep the original size valves in there, or can I swap them out with a set of 1.92/1.50's. Would that be an easy exchange, or would there be extra work involved in going to another size valve?

Joe.

[DoubleVision]

the heads intake seat would have to be opened up by a machine shop to the 1.94 valve size. Honestly, this isn`t exactly the hot tip, since 1.94 valve sbc heads are common and a dime a dozen.
It depends what your using your vehicle for, if it`s a daily driver and performance isn`t in the plan at all, stick with the 1.71 valves, they help low end torque due to higher velocity.