Edelbrock 7576 Air Gap on 318

Factory 4 barrel 318 cars had 360 intake and heads, Chrysler did the same crappy swap most of us make and wonder why its got no power. And the performer makes less HP than 360 stock intake I got one in the garage that my cousin gave me because it slowed his late model down even though weight is very important to those cars especially over the front tires. The ports on them are a compromise too small for 340/360 too large for 273/318.