Edelbrock performer intake manifold for a 318

per edelbrock on their website .97" x 1.95"

the 318 heads i last measured (1968 units) were 1.92 i did not bother measuring the width because my concern was only with the height for gasket sealing purposes, but they were close to that as well.

are you concerned about a mismatch?
Miss match what? How would that even be possible, no car no motor?