5,376 (5,120) Cambridge Surprise Major

Donald F Morrison (no. 1589)
2345678  V  M  W     H
245763      -  -  a  -  (10 leads)
3427586  -              (4 leads)
Repeat eleven times.
a = sT,sT,sT.

Reduce to 5,120 by replacing the first two parts by twenty leads called M,sW,H,B,H,B,sV,B, bringing up 14238765.
Neither length contains any backstroke 87s.