My first 431 went into a black 69 road runner with a 4 speed hacked trans tunnel for an e body shifter and 4.30 gears and epoxied 915 heads and that little '383' took 4x what it cost to build playin possum ( long odds) against some pretty serious street iron and trailered race cars with 'borrowed' plates.

I agree whole- heartedly and I'll always have a soft spot for 431-451's cause I cut my teeth on them after switching fromw2 small blocks.