Didn't know you were running a stroker engine. In that case, your builders are out to lunch as the 4V heads work better with big-inch engines than with the stock size. As Jr Wilson said of his 427 Silver State motor, ..."the heads really come alive when you open the motor up to 427 inches....". After all, the 351C is really a short-stroke big-block engine; the ports & valves are almost identical to the Boss 429- 460 engines, and they have no 'low-end' problem IMHO.
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