The Most Powerful Small Block Mopar..??

moper said

I don't think the W9 can move enough air... What's the limit on nitro percentage?

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From what I could find, the W9 RP is the best head for this application. Had another head better than the W9? The ideal would be that there is a block for use with P7 head.
The nitromethane is free, you can use all you want.