[1971 cheburban]

I have a freshly done 350 block, and I wanted to know if I can run 327 heads(491,492s,etc.) with a smaller combustion chamber.the main reason is edelbrock has the ram log 6x1 intake and says it only is for 283-327. So I thought maybe I can run 327 heads and use that intake but on my 350 block, anybody have any experience on this subject or can explain why that 6 carb intake won't work on regular 350 heads I'd appreciate it