When I rebuilt my own engines, I replaced everything and used the best parts. I used Ferreas instead of recutting old valves.. A savings of only $50-60 for both intake and exhaustif you look at how much it costs R&R valves and resurfacing them versus buying a new piece.
I tend to spend $500-700 more on an engine build for replacing parts that could be reused. I also like to replace the rods. But that depends on hot "hot" you plan on building it.
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1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.
