It's going to depend on what your purpose and power band is.
Ford 351 Windsor V8
SUPER VICTOR 9.2 (4500-8500 rpm)
Designed for high-rpm, large displacement and competition 351-Windsor Fords, the Super Victor 9.2 is for engines with an 9.2" deck height. Ideal for drag racing or oval track engines operating from 4500 to 8500 rpm, this single-plane intake is engineered for square-bore carbs and includes rear cooling and nitrous bosses. Runners have a 3.10 square-inch cross sectional area. Carb pad is .34" taller than Edelbrock Victor Jr. #2980. Match this race-winning manifold with Edelbrock heads #77219 or Victor Jr. heads #77169.
Ford 351 Windsor V8
VICTOR JR. 351-W (3500-7500 rpm)
Designed for competition 351 Windsor Ford V8s from 1969 and later with the following heads: Edelbrock Performer RPM heads #60259, Victor Jr. heads #77169, Victor heads #77219 or similar heads. Two versions available: #2980 fits SVO blocks with a 9.20" deck height and #2981 fits standard 351-W blocks with a 9.50" deck height. Ideal for both oval track and drag racing engines operating between 3500 and 7500 rpm. Runners have a 2.70 square-inch cross sectional area.