Hi everyone. Just browsing through the pages of my Echlers parts catalog, and saw that there were two clutch Z bars offered for the '62-'64 Chevys. One is for the sbc and the other is for a 409. Both with separate part numbers. Took a look at Hubbards and saw one Z bar offering for '62-'64. No mention made of sbc or 409. Then looked at Show Cars and like Echlers, they list 2 different offerings. My '62 came with a sbc engine. Am I to assume that the Z bar I have will not work and I have to order one for a 409?? I'll certainly order it if needed but what might the difference be if anyone knows?? Also, can the Z bar be installed after the engine is bolted in or is it best to do initially while installing the engine?? Thank you, Carmine.