Wanting to know which is better for having to pull vacum bleed off lifters or mechanical roller lifters? Running windsor have to pull 17 inches at 1000 rpm . To run in the street class. Need to run around 550-600 horse power . Have to run factory heads & dual plane intake .
First things first cubic inches cubic inches cubic inches. Vacuum is the easy part any good custom ground cam can get you to put what ever vacuum you need.