Not sure what my HP is but '72 round port 455HO- modified heads, headers, no heat crossover on intake, modified dist and q jet, forged pistons, prepped rods, hi lift cam, 1.65 roller rockers= 180,000 so far. Been using some oil but, still plenty strong. Drove it on a 11,000 mile road trip all over the US in 2007.
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