Originally Posted by T-Mar

I assume you're talking about the 7400 sidepull calipers? These were only available in a short reach version. The OEM brakeset on the 1981 Nishiki Professional was the longer reach version of the Campagnolo Record, which explains the discrepancy you're experiencing. Aesthetically, the best solution would be to find a pair of the long reach Shimano New 600EX, long reach calipers from the same period (part number BR-6208-57). These have an additional 8mm reach over the similarly styled BR-7400 calipers. Be aware that there is also a short reach version of the New 600EX calipers (BR-6208-49), so make sure you search out the correct version.

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