Need some help interpreting Holleys, Throttle Body Base Template and if the TB would bolt on to my 1958, 3100, 235 intake manifold. The TB base has stud holes that are on 2.75” centers where it appears the intake manifold, carb hold down studs are on 3” centers. If I’m interpreting the drawing correctly, the TB base is machined for 7/16” hold down studs, where the intake manifold uses 3/8” studs.

With a little careful filing, could the TB base stud holes be elongated enough to accept the intake manifold studs and keep the integrity of the TB base intact?
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Dan

35 CC Case
38 Chevy Pickup
51 3100 AD
58 3100 Apache Fleetside