I'll have to check it out. The 400 small block is my favorite, I have a few of them, the best one is in my S10. The 400 is different, all right, there are some things they like that 350's don't, and the camshaft that works in a 350 doesn't work in a 400, which the grinders know, hence their "400 Special" grinds. It is that rod length/stroke ratio.
When you know about this and factor it in, the 400 really likes .020" extra stroke when you grind the crank. It likes more even better, but when using stock rods .020 is all you dare. Aftermarket rods fixed that problem, which is rod bolt head/cam lobe clearance.
The 400 also enjoys the Edelbrock RPM head/intake combo, but they aren't quite "just" a bolt-on. Stock 400 heads are the worst.
Great engine! The aftermarket, namely World Products, has taken it to extremes with their new block, which has the camshaft moved up higher. 454 cubic inches is popular.
Mine's good enough at 412. Scary. My wife won't ride in it.![]()


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