Webjan 9, 2008 · a 350 with flat tops and 64cc double humps should make around 10:1 cr. This compression is high enough to use a good size cam. But that would also require more gear and stall. They were manufactured with larger intake and exhaust port volumes. Webjan 14, 2013 · 275 postsjoined 2011. You will get a few different answers but if you get 500hp n/a from them you have done well. even ported you will be. Webjan 17, 2018 · for a given power level, most 327 and 350 heads were identical, or nearly so, before 1970. 2 barrel heads all the same as each other, standard 4 barrel heads.
