Nick's Garage dyno's a 318 Stroker.

If you go back two videos back from Nick's 390 dyno video, he had a 360 stroker video, which came out to 410c.i. The 390 best pull on the dyno was 405 HP with 360 heads, RPM Performer intake and stock exhaust manifolds, the 410 made 425 HP with Edelbrock heads, RPM AirGap intake and headers. Both with the same Thumper carb, 20 cubic inches bigger, 20 horsepower more, makes that 318 stroker 390 look pretty good. I have heard to many times the 318 has to small a bore to make any real power, but the internet is full of people telling us how much power and how great 4.8,5.3,and 5.7 LS engines are with even smaller bores. Talking about bore size these internet heroes should really be hating on on the 302 Coyote engine, that only has something like a 3.5 inch bore and is probably the most horsepower per cubic inch naturally aspirated engine made in a modern muscle car.