[blykins]

I'd be willing to say that you had more horsepower before the freshen-up.

A set of Webers doesn't add horsepower by itself, they usually are down a few peak hp to a good single plane intake with the correct size carburetor. Any lack in mid-range power and throttle response can be cured with the correct camshaft.

Webers sure look cool, but they simply don't have the leg-up on other induction systems.