Thread: Is a sbc 400 worth time or a waste

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There was a 400 4-bolt block, but it proved to be weaker than the 2-bolt block in the main bearing web area. Not enough material to prevent the crank saddles from pulling out of the block at high hp levels.

This will make an excellent platform to build a rice killer if your intention is to build a small block motor. If you need money right now, sell it. If not, hold onto it and build it later. You don't necessarily need a forged crank either, depending on the rpm limit and the cam you use. See combo #15 here. Although it's a 383, the same parts would apply to a 400, it's the same stroke....
http://www.ryanscarpage.50megs.com/combos2.html