A 289 can handle 600 HP? Once maybe. Even with a cryo freeze on the block, crank and valve springs, main girdle support, forged slugs and the rest, it "might" handle it, but for a very short time. And certainly not with OEM parts. I just received a photo from a friend who made 545 HP on a stock block. The crack ran from the distributor down the entire lenght of the block. Been there, done that. If you want to run a turbo, start with a fairly low compression motor, 8 to1 so you can use some boost. A higher compression motor would be limited to 6 to 8 pounds of boost. If you are worried about lag, go with a Kenne Bell whipple charger...no lag. But again on a stock motor, you have to run some sort of boost retard module to pull timing out and make sure you have an good fuel supply. Even then your gain would only be around 65-75 HP, since you cant really crank up the boost without detonating.
Ron
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