400 stroker suggestions

You will love the 471/474" B. Those heads are superior to what I have run on a 471B, but with ported RPM heads, we put a FED rail into the low 8's/high 7's in the 1/4mi at 170mph. That's over 600hp with flat top pistons (we used 6.535" rods for a decent skirt length on the pistons) and a moderate solid roller (274*@.050", .688" lift) cam, with a tunnel ram and zoomie headers. Low maintenance and great durability.