How many 68 vert. 400 (400 + H.O. + R.A.) 4sp. 's were made???
Unless the PHS people have recently broken the production statistics down further, we only have the various code engine production numbers and gross coupe and convert body numbers are available.
A 16% convert to total production ratio times the engine production is highly inaccurate but something for a rough order of magnitude estimate.
For example, 684 YW 400HO AT engines made times 16% convert ratio for an rough estimate total 109 with that combo.