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Originally Posted by Roll'nSlo
May do that to squeeze a little more out of it if possible.
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If your going to put it on the bottle, Make sure you plan for that. If its just a 100 shot you will be fine with most parts but anymore and you will want a solid piston/rings and the cam will be a little different as well.
Quote:
Originally Posted by bbcmudtruck
If you have a standard bore block that will clean up at .30, go that route. No need in boring the block more than needed. Your not going to miss the difference between the 489 and a 496. If your starting from scratch, get ahold of cnc motor sports for a rotating assembly. They are truly balanced in house before shipped to you. Unlike jets or summit. Ideally, you'd want a 4.25 stroke crank, 6.385 rods and pistons to match accordingly. I prefer scat assemblys, but anything can be broken if abused! You'll need your rotating assembly before you take your block to the machine shop. Almost forgot, if it hasn't been mentioned yet, be sure to get an internal balanced crank. You'll need a neutral flex plate and 427 harmonic dampner.
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I never got the internal/external balancing. Ya sure its great to have the assembly balanced with less weight on the ends of the crank. But for a 500hm application? does it really matter that much? If he goes external he can reuse his balancer and flex plat that he has, saving a couple hundred bucks.