So what you're saying is just buy the new ones that are available and like RRR and Wyrm said get the long valves if going with a big cam, I would assume chambers should be closed for quench purposes as well. I'm comfortable setting up big blocks (Heck last year did A 451 with 12" vaccum go 612hp 625tq) but the small blocks I'm not sure that's why I ask people that know better. There just are so many
