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Message: <blockquote data-quote="Shocker98GT" data-source="post: 181142" data-attributes="member: 9697">I don't know why people think the problem is due to the motor being OHC. OHC is the saving grace to these motors. If you designed a 281 cubic inch motor with a 3.55 bore size, and stuck with the 2V pushrod configuration it would mean an enormous power loss, it would be a DOG, substantially worse than our cars.The 3V heads flow very comparably to the LS6 heads, that's measured on a flowbench set up for a 3.55" bore size. The 4V heads do even better. And this is done keeping enough velocity to maintain low end torque on a small displacement engine. Put those type heads on a 4" bore, reshape the chamber, relocate the valves a bit, it'll make more power AND more torque than the LSx and Hemi engines on the market. Bar none. Just look at the gains people are getting from these motors going to just a 3.7" bore size, most are gaining 30-40lb/ft throughout the ENTIRE rpm range with no other changes. 4" bore would be even better. And add enough displacement to take advantage of the potential headflow....it would murder anything GM and Chrysler have on the table right now. And it'd do it with less displacement, as long as the bore stays large.</blockquote>