Shaving A Engine Head On A Outboard What Valve Springs Would Fit On My Pontiac Gto 1967 V8 400/6.6L Big Block V8?

What valve springs would fit on my Pontiac Gto 1967 V8 400/6.6L Big Block V8? - shaving a engine head on a outboard

Hello .... I have a block of 1967 Pontiac GTO V8 6.6L/400 great .... I have the head of the razor blade ... I am now the head ...... But she said that would not be appropriate since his actions to change the valve spring ...... can someone tell me how a witch? It's difficult when your exact year and all or make an adjustment V8 valve springs?

Please reply ....... need to know for tomorrow