Quote Originally Posted by 383 chev
I is no math genius but i have a buddy that ran a 406 in a 85 trans am with the vortec heads lil bit bigger cam than vortec king wants and more compression also and he ran 11.20's all day long. vortecs are (imo) a good flowing head for OEM.
One of the biggest problems with the Vortec heads is the exhaust to intake ratio.
To try and help the exhaust side run a cam the favors the exhaust side.
I would look for cams that have 8-10 degree's more duration on the exhaust side at .050 also run more lift on the exhaust side.