Originally Posted By AndyF
Originally Posted By Wookie316
So is there any advantage or disadvantages between the 440/505 or the 400/512 I personally run?
Curious is all.


The RB block has better choices for main bearings and intake manifolds. Also, a lot of headers are designed for RB blocks rather than B blocks. I've also run into various clearance issues with B blocks that the RB blocks don't have. It just seems like the aftermarket is more up to speed on RB parts than B parts so life is a little easier when you build a 440 based engine.

This a somewhat surprising twist to me, for years most of the high HP non aftermarket BB guys have leaned to the 400 block for strength and longevity desires...

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