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i thought i was funny but I think im actually pretty close. the dss pistons are a tad on the heavier side but still will get what you want gl with it. i love 331s
 

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500 at the crank through a 5 speed is "roughly" 440rwhp. depending on the dyno and operator. it doesn't really matter though if its a cruiser. i have about 700, supercharged 408, i never use it but it sounds nice and Im proud that i did in my driveway.

if you get 400+rwhp from a 331, thats an excellent engine.
 

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Ya, I don’t know how this thread turned into the “no way a 347 made 551hp” thread. I was just using that as an example of what my 331 may be comparable to since we used a few of the same parts. I will be extremely happy with 450 crank hp when it’s all said and done.
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looking forward to the results. post them when you get em. gl
 
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