Larger valves

[Buick Beginner]

Can anyone provide some part numbers for the larger valves for our heads and what the heads need to be cut to? Thanks - BB

 

[Doug Jacobson]

Ferrea f6233and f6234 are their 6000 series valves, some of the best. They are 1.50 exh (stock size) and 1.77 intake (.07" bigger than stock) Manley also carries the same sizes too. Not sure of their part numbers though. Ferreas will be hard to find as they have one of the numbers out if stock now.