The best stroker 408-416-426-435 combination in stock 68 340 block

rumblefish360 said
273 & everybody else, please proceed to 9:50 in the video.
(I know which one I’d rather drive/race!)

I'd have to watch it from the beginning to see what they did, but the smaller engine would need a different cam, valve job and cam timing. If they didn't compensate for that, the test means nothing.